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  • m
    m
    abbreviation
    mass.
  • 'm
    'm
    contraction of am.
  • M
    M
    noun
    the thirteenth letter of the English alphabet, a consonant.
  • M'-
    M'-
    variant of Mac-.
  • m-
    m-
    meta-.
  • M-
    M-
    (used to designate the production model of military equipment, as the M-1 rifle.)
  • m.
    m.
    abbreviation
    noon.
  • M.
    M.
    abbreviation
    noon.

m

1 American  

abbreviation

  1. Physics. mass.

  2. Finance. (of bonds) matured.

  3. medieval.

  4. medium.

  5. meter; meters.

  6. middle.

  7. Music. minor.

m 2 American  
Symbol, Electricity.

  1. magnetic pole strength.

'm 3 American  
[m] / m /

  1. contraction of am.

    I'm not thirsty.
M 4 American  
[em] / ɛm /
Or m

noun

  • M's,
    plural
  • Ms,
    plural
  • m's,
    plural
  • ms
    plural

  1. the thirteenth letter of the English alphabet, a consonant.

  2. any spoken sound represented by the letter M or m, as in my, summer, or him.

  3. something having the shape of an M.

  4. a written or printed representation of the letter M or m.

  5. a device, as a printer's type, for reproducing the letter M or m.

  6. Printing. em.

M 5 American  

abbreviation

  1. mach.

  2. Music. major.

  3. male.

  4. married.

  5. Medieval.

  6. medium.

  7. mega-.

  8. Middle.

  9. modal auxiliary.

  10. modifier.

  11. Economics. monetary aggregate: issued periodically by the Federal Reserve Board as various measures of money supply (M-1, M-1A, M-2, etc.).

  12. British. motorway (used with a road number to designate a major highway).

    the M1.
M 6 American  
Symbol.

  1. the thirteenth in order or in a series.

  2. (sometimes lowercase) the Roman numeral for 1000.

  3. Electricity. magnetization.

  4. Biochemistry. methionine.

M'- 7 American  

  1. variant of Mac-.

m- 8 American  

  1. meta-.

  2. (referring especially to the use of wireless electronic devices) mobile.

    m-commerce; m-business.
M- 9 American  

  1. U.S. Military. (used to designate the production model of military equipment, as the M-1 rifle.)

m. 10 American  

abbreviation

  1. noon.

m. 11 American  

abbreviation

  1. (in prescriptions) mix.

m. 12 American  

abbreviation

  1. male.

  2. (in Germany) mark; marks.

  3. married.

  4. masculine.

  5. Physics. mass.

  6. medium.

  7. meter.

  8. middle.

  9. mile.

  10. minute.

  11. modification of.

  12. modulus.

  13. molar.

  14. month.

  15. moon.

  16. morning.

  17. mouth.

M. 13 American  
Or m.

abbreviation

  1. noon.

M. 14 American  

abbreviation

  • MM
    plural

  1. Majesty.

  2. Manitoba.

  3. markka; markkaa.

  4. Marquis.

  5. Music. measure.

  6. medicine.

  7. medium.

  8. meridian.

  9. Monday.

  10. Monsieur.

  11. mountain.

m 1 British  
/ ɛm /

noun

  1. the 13th letter and tenth consonant of the modern English alphabet

  2. a speech sound represented by this letter, usually a bilabial nasal, as in mat

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
'm 2 British  

contraction

  1. (verb) am

  2. (noun) madam

    yes'm
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
m 3 British  

symbol

  1. metre(s)

  2. mile(s)

  3. milli-

  4. minute(s)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
M 4 British  

symbol

  1. mach

  2. medium (size)

  3. mega-

  4. currency mark(s)

  5. million

  6. 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

  7. Middle

  8. physics modulus

  9. (in Britain) motorway

    the M1 runs from London to Leeds

    1. mature audience (used to describe a category of film certified as suitable for viewing by anyone over the age of 15)

    2. ( as modifier )

      an M film

  11. logic the middle term of a syllogism

  12. physics mutual inductance

  13. chem molar

  14. 1000 See Roman numerals

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

abbreviation

  1. Malta (international car registration)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
m- 5 British  

prefix

  1. short for meta-

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
M'- 6 British  

prefix

  1. a variant of Mac-

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
m- 7 British  

prefix

  1. indicating the use of mobile-communications technology

    m-banking
"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
m. 8 British  

abbreviation

  1. cricket maiden (over)

  2. male

  3. mare

  4. married

  5. masculine

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
M. 9 British  

abbreviation

  1. Majesty

  2. (in titles) Member

  3. million

  4. Also: M.  Monsieur

  5. mountain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
m Scientific  

  1. Abbreviation of mass, meter

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:

The wreckage was scattered across 37,000 sq m, the equivalent of five football pitches, as the plane collided with accommodation for medical students, and broke apart.

From BBC ● Jun. 11, 2026

The tracker continuously follows the Sun throughout the day and directs sunlight into a 20 m plastic multimode optical fiber.

From Science Daily ● May 18, 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

This includes a substantial 354 sq m aisled building to the south east of the villa - which the team believes was either some sort of barn or meeting hall.

From BBC ● Jan. 11, 2026

“Gowon, what have I done to you? Gowon, olee ihe m mere gi?”

From "Half of a Yellow Sun" by Chimamanda Ngozi Adichie

“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 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

July 31—I ’m on the edge of it.

From "Flowers for Algernon" by Daniel Keyes

Macy’s M -4.19%decrease; down pointing triangle raised its guidance for a second time this year after recording growth across its brands.

From The Wall Street Journal ● Sep. 10, 2026

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

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 is not governed by the usual impulses of the civilian; she has no use for love or hate, desire or abnegation.

From Los Angeles Times ● Aug. 24, 2026

So, before we broke up into teams for a little touch sevens, I asked Coach M if I could talk to him.

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

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

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

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

M- Malvolio; M- why, that begins my name.

From Twelfth Night; or What You Will by William Shakespeare

Dr. M- also would be glad of a copy. 

From Letters from the Cape by Lady Lucie Duff Gordon

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

One of the runaways said, again, “Let m. go back. Let me go back,” and stood still, and then turned around and said, over his shoulder, “I am going back.”

From "Harriet Tubman: Conductor on the Underground Railroad" by Ann Petry

But Melissa M., a 24-year-old in Canada, told Salon she wouldn’t go even if the event were free.

From Salon ● Sep. 11, 2026

Chief Executive Officer Joseph M. Nicchitta praised the bill Thursday as a “thoughtful and balanced package of reforms.”

From Los Angeles Times ● Aug. 28, 2026

“The president this time is focused on the Indo-Pacific as a market,” said Richard M. Rossow, chair on India and emerging Asia economics at the Center for Strategic and International Studies, a Washington think tank.

From The Wall Street Journal ● Aug. 28, 2026

As a result, M. aurita is the correct scientific name.

From Science Daily ● Aug. 26, 2026

Dr. Taylor M. Martin, bird rescuer, is what’s needed to stop Ray from circling the nest, and to save the crying eaglet from death.

From "A Bird Will Soar" by Alison Green Myers

The bulk of the book, especially the passages from M’s journals, are given to dewy philosophizing on the purpose of creation.

From The Wall Street Journal ● Sep. 1, 2026

In later scenes, M has died and S’s main conversation partner is an artificial-intelligence voice agent that was trained on M’s writing.

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

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 M & M’s were thrown in the air, gone.

From "The Joy Luck Club" by Amy Tan

With Ms Meek as his teacher, Sam was able to improve and meet school grade expectations.

From BBC ● Sep. 9, 2026

"Ms Meek and the other adults there planted seeds in me that I probably couldn't see at the time, but they became part of the foundation I grew from," he said.

From BBC ● Sep. 9, 2026

BBC Wales reunited Ms Meek and Sam at St Michael's Catholic Primary School in Pontypridd, where she first taught him 25 years ago.

From BBC ● Sep. 9, 2026

The most infectious song on the album is Ms Paper, which takes a detour into Bouyon – a Dominican music characterised by high tempos and frantic percussion.

From BBC ● Aug. 12, 2026

I want to know what they’re going to talk about, but I can’t stay out here while 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

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

Again, in the famous love duo in the "Walküre," note the repetition of the liquid consonants, the l's and m's, which give the sound such a soft and sentimental background.

From Chopin and Other Musical Essays by Henry Theophilus Finck

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

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

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.