m
abbreviation
mass.
m
1 American
m
2
American
Symbol, Electricity.
'm
3
American
[m]
/ m /
M
4
American
[em]
/ ɛm /
Or
m
noun
-
M's,
plural
-
Ms,
plural
-
m's,
plural
-
ms
plural
-
the thirteenth letter of the English alphabet, a consonant.
-
any spoken sound represented by the letter M or m, as in my, summer, or him.
-
something having the shape of an M.
-
a written or printed representation of the letter M or m.
-
a device, as a printer's type, for reproducing the letter M or m.
-
Printing. em.
M
5
American
abbreviation
-
mach.
-
Music. major.
-
male.
-
married.
-
Medieval.
-
medium.
-
mega-.
-
Middle.
-
modal auxiliary.
-
modifier.
-
Economics. monetary aggregate: issued periodically by the Federal Reserve Board as various measures of money supply (M-1, M-1A, M-2, etc.).
-
British. motorway (used with a road number to designate a major highway).
the M1.
M
6
American
Symbol.
-
the thirteenth in order or in a series.
-
(sometimes lowercase) the Roman numeral for 1000.
-
Electricity. magnetization.
-
Biochemistry. methionine.
M'-
7
American
m-
8
American
-
(referring especially to the use of wireless electronic devices) mobile.
m-commerce; m-business.
M-
9
American
m.
10
American
abbreviation
m.
11
American
abbreviation
m.
12
American
abbreviation
-
male.
-
(in Germany) mark; marks.
-
married.
-
masculine.
-
Physics. mass.
-
medium.
-
meter.
-
middle.
-
mile.
-
minute.
-
modification of.
-
modulus.
-
molar.
-
month.
-
moon.
-
morning.
-
mouth.
M.
13
American
Or
m.
abbreviation
M.
14
American
abbreviation
-
MM
plural
-
Majesty.
-
Manitoba.
-
markka; markkaa.
-
Marquis.
-
Music. measure.
-
medicine.
-
medium.
-
meridian.
-
Monday.
-
Monsieur.
-
mountain.
m
1
British
/ ɛm /
noun
-
the 13th letter and tenth consonant of the modern English alphabet
-
a speech sound represented by this letter, usually a bilabial nasal, as in mat
'm
2
British
contraction
-
(verb) am
-
(noun) madam
yes'm
m
3
British
symbol
-
metre(s)
-
mile(s)
-
milli-
-
minute(s)
M
4
British
symbol
-
mach
-
medium (size)
-
mega-
-
currency mark(s)
-
million
-
astronomy Messier catalogue; a catalogue published in 1784, in which 103 nebulae and clusters are listed using a numerical system
M13 is the globular cluster in Hercules
-
Middle
-
physics modulus
-
(in Britain) motorway
the M1 runs from London to Leeds
-
-
mature audience (used to describe a category of film certified as suitable for viewing by anyone over the age of 15)
-
( as modifier )
an M film
-
-
logic the middle term of a syllogism
-
physics mutual inductance
-
chem molar
-
1000 See Roman numerals
abbreviation
m-
5
British
prefix
M'-
6
British
prefix
m-
7
British
prefix
m.
8
British
abbreviation
-
cricket maiden (over)
-
male
-
mare
-
married
-
masculine
M.
9
British
abbreviation
-
Majesty
-
(in titles) Member
-
million
-
Also: M. Monsieur
-
mountain
m
Scientific
Other Word Forms
Noun Inflected Forms
Etymology
Origin of m.10
From the Latin word merīdiēs
Origin of m.11
From the Latin word misce
Origin of M.13
From the Latin word merīdiēs
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:
Here, E again represents energy, m is the particle's mass, and c is the speed of light.
From Science Daily ● Mar. 10, 2026
“I m not sure why he was sanctimonious and agressive when detailing the harvey weinstein allegations,” Epstein wrote. “now watching the overlay , its amazing.”
From Salon ● Feb. 6, 2026
The changes to England's Biodiversity Net gain rules exclude developments under 2,000 sq m of land under a drive to make it easier to build homes on smaller sites.
From BBC ● Dec. 16, 2025
For velocity-dependent interactions with force ranges >10⁶ m, the projected sensitivity improves by 6 to 7 orders of magnitude.
From Science Daily ● Dec. 6, 2025
I m not doing nothing, I said, my voice muffled in my ruined shirt.
From "Winger" by Andrew Smith
“I ‘m not going back to Woodstock for a while / Though I love to see that lonesome hippie smile,” sang Neil Young in 1974.
From Los Angeles Times ● Nov. 12, 2023
This is what people say when I first tell them I ’m on the spectrum.
From Scientific American ● Apr. 7, 2022
“I miss him terribly, but not in the state that he was. He’s at peace, and I ‘m OK with that.
From Seattle Times ● Jan. 7, 2022
I ’m not one to switch bags often, so I have just one that serves as many functions as a bag can have.
From The Verge ● Sep. 8, 2017
July 31—I ’m on the edge of it.
From "Flowers for Algernon" by Daniel Keyes
The NTA needs deep structural reform to address recurring failures, but abolishing it is not the answer, said M Jagadesh Kumar, former chairman of India's universities regulator.
From BBC ● Sep. 6, 2026
“The poet must strike a match, light up the cold cosmos, and insist on the power of imagination over the universe of death,” M writes, rejecting disillusionment.
From The Wall Street Journal ● Sep. 1, 2026
M and the writer move through highly mediated spaces that amplify certain features and downgrade others, a kind of edited, hyperreal landscape.
From Los Angeles Times ● Aug. 24, 2026
M wants his daughter to go to university, and saved every cent so they could move to Iran so she could study there.
From Barron's ● Aug. 11, 2026
Coach M blew his whistle to break practice.
From "Winger" by Andrew Smith
It is hence possible to employ crude cresol, which contains varying quantities of the o-, m-, and p-compounds, in the manufacture of these tanning matters.
From Synthetic Tannins by Georg Grasser
Th-That was F-Father's idea of m-making m- m-merry.
From The Voyage of the Hoppergrass by Edmund Lester Pearson
Similarly, condensation of different samples of crude cresol containing varying quantities of o-, m-, and p-cresol did not yield end-products sufficiently different to justify describing them in detail.
From Synthetic Tannins by Georg Grasser
Benzene, for instance, is easily converted into the m-disulphonic acid by gently heating with fuming sulphuric acid; stronger heating converts the m- into the p-disulphonic acid, and at 190° C. the trisulphonic acid is formed.
From Synthetic Tannins by Georg Grasser
Another major irritant was introduced last August when the U.S. imposed a ban on the sale of sensitive technology to China, claiming Beijing had violated an international agreement by selling M- 11 missiles to Pakistan.
From Time Magazine Archive
The M- | 11, with a range of about 180 miles, is capable of carrying nuclear warheads.
From Time Magazine Archive
Soft- drink vendors hawked their wares as rebel soldiers slouched atop U.S.-made M- 41 tanks, idly awaiting victory.
From Time Magazine Archive
I have promised Mr. M- to procure and send him an exact account of the process in Spain.
From Letters from the Cape by Lady Lucie Duff Gordon
"One afternoon he had a long waltz with M- in the ballroom."
From Alfred Tennyson by Andrew Lang
On Thursday at 1 p. m., a service will be held at Acacia Memorial Park in Lake Forest Park, with full military honors.
From Seattle Times ● Jan. 31, 2022
Tours: Tuesday through Saturday from 12:45 p.m. to 3 p. m., subject to availability.
From Washington Post ● Feb. 7, 2019
Lobbying groups for bees remain small, but funding from groups such as Project Apis m., which has contributed $6 million toward bee research since 2006, is helping uncover methods to protect bee populations.
From Washington Times ● Aug. 28, 2016
Danielle Downey, director of operations for the nonprofit group Project Apis m., examines bees on a frame.
From National Geographic ● Jun. 27, 2016
And Faber was out; there in the deep valleys of the country somewhere the five a. m. bus was on its way from one desolation to another.
From "Fahrenheit 451" by Ray Bradbury
For many years, M. trumani played a major role in theories about the ecology of Ice Age North America.
From Science Daily ● Sep. 8, 2026
Each contains an addendum to the mortgage that is used for rental properties, said New Jersey real estate lawyer Daniel M. Shlufman.
From Salon ● Sep. 5, 2026
The Amicus bonus episode revisits a 2021 conversation among Dahlia Lithwick, Judge Edward M. Chen, and Don Tamaki, members of the legal team that overturned Korematsu v.
From Slate ● Aug. 20, 2026
But we have more control over our balance than we may realize, urges Duke University balance researcher, Kristal M. Riska, who’s president of the American Balance Society.
From Los Angeles Times ● Aug. 18, 2026
Dr. Taylor M. Martin is always quick to point out, “Drivers should stop and let them pass. Let them stay together. Don’t honk...Would you want someone to honk at you?”
From "A Bird Will Soar" by Alison Green Myers
Alternating with these vignettes are lengthy excerpts from M’s bohemian heyday of 2023—three journals and a short screenplay.
From The Wall Street Journal ● Sep. 1, 2026
It was a feast day and everyone was celebrating, but M's daughter stayed in her room crying.
From Barron's ● Aug. 11, 2026
The M’s also traded for super utilityman Brendan Donovan, who, as a member of the St. Louis Cardinals, was named an All-Star for the first time in his career last season.
From Los Angeles Times ● Mar. 24, 2026
The £1.4m takeover by Warpaint will see the closure of Barry M's factory in the capital and puts 100 jobs at risk.
From BBC ● Feb. 9, 2026
Lift me like a little child That I may dwell with— I tapped M's.
From "A Long Way from Chicago" by Richard Peck
Ms Richards said: "Our midwives are stretched, and quite often that is often impacted into the postnatal care, into the community settings."
From BBC ● Sep. 7, 2026
Ms Richards said more investment and a workforce plan was needed.
From BBC ● Sep. 7, 2026
"This is a complete misunderstanding, Your Honour. My client was trying to get a picture of Ms Clancy," Light's attorney Jennifer White said in court.
From BBC ● Sep. 2, 2026
"This loss of life is colossal and the effect those losses will have on their friends and families is incalculable," Ms Ní Raghallaigh added.
From BBC ● Aug. 17, 2026
Perhaps it was because he had never known a mother of Ms own, so that the rdle of mother love, as she stood with her children behind her, took him between wind and water.
From "The Once and Future King" by T. H. White
Why is it that the three m’s seem to have so much bipartisan appeal?
From Slate ● Nov. 6, 2020
Ryan, what's the pitching rotation going to look like in a couple years for the m's?
From Seattle Times ● Aug. 18, 2019
Part of the reason the m's haven't moved Ichiro is the poor hitting by Justin Smoak until very recently.
From Seattle Times ● May 15, 2012
Among the telltale tidbits scrutinized are the size and slant of the script, how the t's are crossed and whether the m's and n's are round, pointed or wedge-shaped.
From Time Magazine Archive
The m's and n's are all alike, and so are most of the other letters.
From Master of the Vineyard by Myrtle Reed
In Australia, Surfshark’s ping times ranged from 229 to 281 ms, while NordVPN’s latency was slightly lower, averaging 210 to 260 ms.
From Salon ● Mar. 27, 2026
In Australia, Surfshark’s ping times ranged from 281 to 422 ms, while NordVPN’s latency was lower — between 292 and 406 ms — based on test data.
From Salon ● Mar. 27, 2026
When small creatures touch the fine trigger hairs on the outside of the door, it opens inwards within 0.5 ms.
From Science Daily ● Nov. 20, 2024
For electrons, s can only be 1/2, and ms can be either +1/2 or –1/2.
From Textbooks ● Aug. 12, 2015
She said, “It makes good times even better ms when you know they’re going to end. Like grilled vegetables are better because some of them are partly soot.”
From "Feed" by M.T. Anderson
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.
