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
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
Designed by architects WilkinsonEyre, it will include 58,000 sq m of office space, a publicly accessible cultural space and external garden terrace.
From BBC ● Oct. 8, 2025
She pronounced her cousin’s name like dream without the m.
From "Adrift" by Paul Griffin
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 wandering the ghostly hallway of the 50th floor, the high rollers’ floor, of what was once the Trump Taj Mahal Hotel and Casino in Atlantic City.
From Washington Post ● Mar. 12, 2018
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
“I ’m not even sure this car is going to make it.”
From "Miracles on Maple Hill" by Virginia Sorensen
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
The "M" refers to the Mighei meteorite, which fell in Ukraine in 1889.
From Science Daily ● Aug. 8, 2026
Joel Mawhinney, known as Joel M, said the "risky" trick was "the scariest experience" of his life.
From BBC ● Jul. 21, 2026
When asked about the lobbying effort, Chavira referred questions to M Strategic Communications, a lobbying firm retained by Lineage two days after the fire to provide crisis communications and other services.
From Los Angeles Times ● Jul. 10, 2026
‘Sure you do. My name begins with the letter M and I live in Italy. You ought to guess this.’
From "The Heart is a Lonely Hunter" by Carson McCullers
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
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
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
Soft- drink vendors hawked their wares as rebel soldiers slouched atop U.S.-made M- 41 tanks, idly awaiting victory.
From Time Magazine Archive
The M- | 11, with a range of about 180 miles, is capable of carrying nuclear warheads.
From Time Magazine Archive
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
"One afternoon he had a long waltz with M- in the ballroom."
From Alfred Tennyson by Andrew Lang
M- But then there is no consonancy in the sequel; that suffers under probation: A should follow, but O does.
From Twelfth Night; or What You Will by William Shakespeare
Tours: Tuesday through Saturday from 12:45 p.m. to 3 p. m., subject to availability.
From Washington Post ● Feb. 7, 2019
The launch party starts at 7 p. m., though the band will likely perform at around 8:30-9:30 p.m.
From Seattle Times ● Jan. 11, 2017
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
Written on the back of it was “idlewild m. 5.2.36.”
From "Bud, Not Buddy" by Christopher Paul Curtis
"We're advising that you continue to give children a vaccine that has decades of safety data," added Aaron M. Milstone, a member of the AAP Committee on Infectious Diseases.
From Barron's ● Aug. 10, 2026
M. Keith Waddell, CEO of staffing firm Robert Half, said that AI’s impacts on the job market are proving to be “more benign than some have feared.”
From The Wall Street Journal ● Jul. 27, 2026
Lime, with one long-term shareholder, George M. Doumet, controlling a stake of more than 60% through Inberdon Enterprises, as verified by FactSet.
From MarketWatch ● Jul. 15, 2026
District Judge Kathleen M. Williams wrote in an order, released on Monday, breaking down the culmination of Trump’s lawsuit against the IRS.
From Slate ● Jul. 14, 2026
At 2:12 P. M., my last chance for reaching my goal on Thursday was gone.
From "Ida B" by Katherine Hannigan
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 Disappearing Act” is more of a thought experiment about M’s effort to become “invisible and free.”
From The Wall Street Journal ● Mar. 26, 2026
A healthy Kirby could make a huge difference this season for an already formidable M’s rotation.
From Los Angeles Times ● Mar. 24, 2026
"The stars aligned... we'll be friends for life," said Andrea, Hollie M's mum.
From BBC ● Dec. 17, 2025
One was crammed with See’s Nuts & Chews, M & M’s, candy-coated cashews, instant hot chocolate with miniature marshmallows.
From "The Joy Luck Club" by Amy Tan
Ms Mullan said her husband was about to turn 50 three weeks after the tragedy, adding some of his presents remain unopened in their home.
From BBC ● Jul. 31, 2026
"In 2023 alone, 45 unreleased songs belonging to Ms Grande were hacked, stolen, and leaked," the documents said.
From BBC ● Jul. 28, 2026
Further evacuations also took place from La Porge on Thursday night which Ms Brocas said had taken place "calmly".
From BBC ● Jul. 24, 2026
"It is obvious that Ms Ghost, a 49 year old woman, should have appreciated the inappropriateness of her conduct regardless of whether there was any sexual motivation or conduct," the judgement read.
From Barron's ● Jul. 22, 2026
I’m getting funny looks as I stand here, waiting for Ms.
From "The Wrong Way Home" by Kate O’Shaughnessy
Why is it that the three m’s seem to have so much bipartisan appeal?
From Slate ● Nov. 6, 2020
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
Imagine if Ackley had just hesitated, held his ground and then the m's hit into an inning-ending double-play?
From Seattle Times ● Jun. 27, 2011
In Chinese, for example, the Methodist Episcopal Mission becomes, literally, "the doubly beautiful society," because there are two m's in M. E. M., and the Chinese pronounces m as "may," and "may" means "beautiful."
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
Upload speeds were generally stable, though ping times increased significantly on distant servers — reaching over 500 ms in Australia — which could introduce noticeable lag during gaming or video calls.
From Salon ● Mar. 21, 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
The coil will be very close to its full current in about ten time constants, or about 25 ms.
From Textbooks ● Aug. 12, 2015
One evening we went to move an attractive young woman who found it charming to spell the name Kim with an h, a y, and two ms.
From "Me Talk Pretty One Day" by David Sedaris
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.
