- comparative of numb.
number
Americannoun
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a numeral or group of numerals.
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the sum, total, count, or aggregate of a collection of people or things.
The number of children experiencing homelessness in the city has risen alarmingly.
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a word or symbol, or a combination of words or symbols, used in counting or in noting a total.
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the particular numeral assigned to an object or, sometimes, a person, indicating its place in a series.
house number;
license number;
jersey number.
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one of a series of things or people distinguished by or marked with numerals.
Number 5's order is ready to be delivered.
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a code of numerals, letters, or a combination of these assigned to a particular telephone.
Did you call the right number?
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quantity as composed of units or individuals.
The governor put forth a plan to increase the number of eligible voters.
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the count or quantity of a collection or company.
Their number was more than 20,000.
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numbers,
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a considerable amount or quantity; many.
Numbers flocked to the city to see the parade.
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metrical feet; verse.
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musical periods, measures, or groups of notes.
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Informal. the figures representing the actual cost, expense, profit, etc..
We won't make a decision until we see the numbers.
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Obsolete. arithmetic.
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numerical strength or superiority; complement.
The garrison is not up to its full number.
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a single or distinct performance within a show, as a song or dance.
The comic routine followed the dance number.
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a single part of a program made up of a group of similar parts.
For her third number she played a nocturne.
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any of a collection of poems or songs.
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a tune or arrangement for singing or dancing.
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a distinct part of an extended musical work or one in a sequence of compositions.
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conformity in music or verse to regular beat or measure; rhythm.
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a single part of a book published in a series of parts.
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a single issue of a periodical.
The bookcase contained several numbers of a popular magazine.
- Synonyms:
- edition
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Grammar. a category of noun, verb, or adjective inflection found in many languages, such as English, Latin, and Arabic, used to indicate whether a word has one or more than one referent. There may be a two-way distinction in number, as between singular and plural, three-way, as between singular, dual, and plural, or a more complex system.
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Informal. a person; individual.
Why don't you go talk to the attractive number standing at the bar?
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Informal. an article of merchandise, especially of clothing, offered for sale.
Put those leather numbers in the display window.
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mathematics regarded as a system, a basic concept, and a mode of thought.
Number is the basis of science.
verb (used with object)
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to mark with or distinguish by numeral.
Number each of the definitions.
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to ascertain the number of; count.
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to total or amount to.
The manuscript already numbers 425 pages.
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to consider or include in a collection or group.
I number myself among his friends.
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to count over one by one.
to number one's blessings.
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to mention individually or one by one; list; enumerate.
They numbered the highlights of their trip at length.
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to set or fix the number of; limit in number; make few in number.
The sick old man's days are numbered.
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to live or have lived (a number of years).
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to apportion or divide by counting (used withoff ).
The players were numbered off into two teams.
verb (used without object)
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to make a total; reach an amount.
Casualties numbered in the thousands.
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to be numbered or included (usually followed by among orwith ).
Several eminent scientists number among his friends.
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to count.
idioms
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get / have someone's number, to become informed about someone's real motives, character, intentions, etc..
He was only interested in her fortune, but she got his number fast.
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do a number on,
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to undermine, defeat, humiliate, or criticize thoroughly.
The committee really did a number on the mayor's proposal.
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to discuss or discourse about, especially in an entertaining way.
She could do a number on anything from dentistry to the Bomb.
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one's number is / was / will be up,
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one is (was, will be) in serious trouble.
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one is (was, will be) on the point of death.
Convinced that her number was up anyway, she refused to see doctors.
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without number, of unknown or countless number; vast.
The night sky was filled with stars without number.
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by the numbers,
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according to standard procedure, rules, customs, etc.; orthodoxly; by the book.
We're going to run things here by the numbers.
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together or in unison to a called-out count.
The class involves calisthenics by the numbers.
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have someone's number on it, to be thought of as the instrument of fate in the death of a person.
That bullet had his number on it.
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do one's number,
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to give a performance; perform.
It's time for you to get on stage and do your number.
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Slang. to behave in a predictable or customary manner.
Whenever I call, he does his number about being too busy to talk.
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any number of, an imprecisely reckoned but large or diverse collection.
The island is home to any number of artistic residents from around the world.
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a number of, an imprecisely reckoned collection of more than a few; several.
In a number of states, like Ohio, Iowa, and North Carolina, early voting has already begun.
noun
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a concept of quantity that is or can be derived from a single unit, the sum of a collection of units, or zero. Every number occupies a unique position in a sequence, enabling it to be used in counting. It can be assigned to one or more sets that can be arranged in a hierarchical classification: every number is a complex number ; a complex number is either an imaginary number or a real number , and the latter can be a rational number or an irrational number ; a rational number is either an integer or a fraction , while an irrational number can be a transcendental number or an algebraic number See complex number imaginary number real number rational number irrational number integer fraction transcendental number algebraic number See also cardinal number ordinal number
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the symbol used to represent a number; numeral
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a numeral or string of numerals used to identify a person or thing, esp in numerical order
a telephone number
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the person or thing so identified or designated
she was number seven in the race
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the sum or quantity of equal or similar units or things
a large number of people
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one of a series, as of a magazine or periodical; issue
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a self-contained piece of pop or jazz music
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a self-contained part of an opera or other musical score, esp one for the stage
-
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a group or band of people, esp an exclusive group
he was not one of our number
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slang a person, esp a woman
who's that nice little number?
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informal an admired article, esp an item of clothing for a woman
that little number is by Dior
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slang a cannabis cigarette
roll another number
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a grammatical category for the variation in form of nouns, pronouns, and any words agreeing with them, depending on how many persons or things are referred to, esp as singular or plural in number and in some languages dual or trial
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several or many
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military (of a drill procedure, etc) performed step by step, each move being made on the call of a number
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slang to manipulate or trick someone
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informal to discover someone's true character or intentions
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in large numbers; numerously
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informal one is finished; one is ruined or about to die
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of too great a quantity to be counted; innumerable
verb
-
to assign a number to
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to add up to; total
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(also intr) to list (items) one by one; enumerate
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(also intr) to put or be put into a group, category, etc
they were numbered among the worst hit
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to limit the number of
his days were numbered
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A member of the set of positive integers. Each number is one of a series of unique symbols, each of which has exactly one predecessor except the first symbol in the series (1), and none of which are the predecessor of more than one number.
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A member of any of the further sets of mathematical objects defined in terms of such numbers, such as negative integers, real numbers, and complex numbers.
Grammar
As a collective noun, number, when preceded by a, is most often treated as a plural: A number of legislators have voiced their dissent. When preceded by the, it is usually used as a singular: The number of legislators present was small. See also collective noun.
Commonly Confused
See amount,
Synonym Usage
Number, sum both imply the total of two or more units. Number applies to the result of a count or estimate in which the units are considered as individuals; it is used of groups of persons or things: to have a number of items on the agenda. Sum applies to the result of addition, in which only the total is considered: a large sum of money.
Other Word Forms
Derived Forms
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numberernoun
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subnumbernoun
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misnumberverb
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denumberverb (used with object)
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prenumberverb (used with object)
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renumberverb (used with object)
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numberableadjective
Inflected Forms
Nouns
Participles
Conjugated Forms
Present
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numbersimple
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numberssimple
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have numberedperfect
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has numberedperfect
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am numberingprogressive
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are numberingprogressive
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is numberingprogressive
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have been numberingperfect progressive
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has been numberingperfect progressive
Past
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numberedsimple
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had numberedperfect
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was numberingprogressive
-
were numberingprogressive
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had been numberingperfect progressive
Future
Etymology
Origin of number
First recorded in 1250–1300; 1940–45 number for def. 20; Middle English noun nombre, nomber, number, from Old French nombre, numbre, from Latin numerus; verb derivative of the noun
Explanation
When you consider any amount or measurement, you use a number, like 1, 2, 3, 75, or 998,837,211. This math-y word has many uses. Playing the numbers is an illegal form of gambling, and number crunchers are accountants. If you're looking out for number one, you're thinking of yourself. When you number something, you're counting it. A number is a song in a musical or concert. If someone "has your number," they know you well. Getting someone's number also means getting their phone number. If your days are numbered, it means you know you're going to die soon.
Vocabulary lists containing number
Language and Grammar - High School
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Language and Grammar - Middle School
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Pronouns
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
The CEO has consulted with a number of people, internally and externally, about how he should organize its news division.
From The Wall Street Journal ● Aug. 1, 2026
The rising number of uninsured patients is starting to hit hospitals.
From The Wall Street Journal ● Jul. 31, 2026
England's Charley Hull went round in even par to remain on two under par, while world number one Nelly Korda shot 68 to recover from an opening-round two-over-par 73.
From BBC ● Jul. 31, 2026
That’s more than double the number of badges counted in 2022.
From MarketWatch ● Jul. 31, 2026
Earlier today, I asked Zara what she thought, and she told me that no guy would have gone to the trouble of tracking down my number to reschedule a date only to not show up.
From "Red Flags and Butterflies" by Sheryl Azzam
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Douglas nods in agreement before adding: "We want the shows, we want the numbers, we want the awards, we want the love and we want the success."
From BBC ● Jul. 31, 2026
The rulings will apply to jurisdictions that stretch across much of the southern border, affecting states where large numbers of immigrant detainees are held in federal custody.
From Los Angeles Times ● Jul. 31, 2026
While larger populations saw more deaths, their numbers overall were more stable but smaller groups could be "devastated" by the loss of "just one or two".
From BBC ● Jul. 31, 2026
While the automaker doesn’t officially break out exact sales numbers by individual model in its financial reports, many fans of the brand and enthusiasts had been waiting for the R2’s debut in June.
From The Wall Street Journal ● Jul. 30, 2026
Each of us has a paper posted at our workstation containing the numbers for these emergency services so that when we’re asked to patch someone through, we don’t have to think twice.
From "The Brightwood Code" by Monica Hesse
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There he became involved with the Footlights Club, which numbered Graeme Garden and Tim Brooke-Taylor among its members.
From BBC ● Jul. 27, 2026
The details of the bodies are documented and the graves numbered so that family members can return and reclaim them.
From Los Angeles Times ● Jul. 9, 2026
He will begin his visit at the cemetery, where unidentified migrants are buried in numbered graves.
From Barron's ● Jul. 4, 2026
On the NYSE, new 52-week highs outpaced new lows and numbered more than 100 again, so this buy signal is still in place — narrowly averting being stopped out.
From MarketWatch ● Jun. 26, 2026
Amélie peeked and discovered that the pages are numbered, so she’s put them all in order for me, but it’s in English and she couldn’t read it.
From "Code Name Verity" by Elizabeth Wein
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The group, currently numbering 12, envisages growing food to sell, holding workshops and retreats - and even setting up a "granny agency" to look after children.
From BBC ● Jun. 5, 2026
Despite numbering only about 2,000 individuals, the Bristol Bay belugas showed high levels of genetic diversity and relatively little evidence of inbreeding.
From Science Daily ● Jun. 4, 2026
Cepeda was central to Petro’s signature plan, Total Peace, designed to de-escalate conflict with the country’s hybrid groups that are part insurgencies, part drug gangs, each numbering thousands of fighters.
From The Wall Street Journal ● May 25, 2026
Prior to the pandemic, Chinese tourists made up the bulk of foreign visitors to North Korea, numbering roughly 350,000 in 2019 and providing a huge revenue stream for Pyongyang, according to specialist website NK News.
From Barron's ● Apr. 9, 2026
It opened clear on my comprehension that Helen Burns was numbering her last days in this world, and that she was going to be taken to the region of spirits, if such region there were.
From "Jane Eyre" by Charlotte Brontë
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.