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M, m

[em] /ɛm/
noun, plural M's or Ms, m's or ms.
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

1.
Physics. mass.
2.
Finance. (of bonds) matured.
3.
4.
5.
meter; meters.
6.
7.
Music. minor.

m

1.
Symbol, Electricity. magnetic pole strength.

M

1.
mach.
2.
Music. major.
3.
male.
4.
5.
6.
7.
8.
9.
modal auxiliary.
10.
11.
Economics. monetary aggregate: issued periodically by the Federal Reserve Board as various measures of money supply ((M-1, M-1A, M-2) etc.).
Compare L.
12.
British. motorway (used with a road number to designate a major highway):
the M1.

M

Symbol.
1.
the thirteenth in order or in a series, or, when I is omitted, the twelfth.
2.
(sometimes lowercase) the Roman numeral for 1000.
Compare Roman numerals.
3.
Electricity. magnetization.
4.
Biochemistry. methionine.

Mac-

1.
a prefix found in many family names of Irish or Scottish Gaelic origin, as MacBride and Macdonald.
Also, Mc-, Mc-, M'-.
Origin of Mac-
< Irish, Scots Gaelic mac son, Old Irish macc; akin to Welsh, Cornish mab

'm

[m] /m/
1.
contraction of am:
I'm not thirsty.

m-

1.
2.
(referring especially to the use of wireless electronic devices) mobile:
m-commerce; m-business.

M-

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

M'-

1.
variant of Mac-.

m.1

1.
noon.
Origin
From the Latin word merīdiēs

m.2

1.
(in prescriptions) mix.
Origin
From the Latin word misce

m.3

1.
male.
2.
(in Germany) mark; marks.
3.
4.
5.
Physics. mass.
6.
7.
8.
9.
mile.
10.
11.
modification of.
12.
13.
14.
15.
moon.
16.
17.

M.1

or m

1.
noon.
Origin
From the Latin word merīdiēs

M.2

1.
2.
3.
markka; markkaa.
4.
5.
Music. measure.
6.
7.
8.
9.
10.
plural MM. Monsieur.
11.

Mc-2

1.
variant of Mac-.
Also, Mc-.

mu

[myoo, moo] /myu, mu/
noun
1.
the 12th letter of the Greek alphabet (M, μ).
2.
the consonant sound represented by this letter.
3.
micron (def 1).
Origin
First recorded in 1895-1900, mu is from the Greek word
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for m
Contemporary Examples
Historical Examples
  • The Syrians added to it an m, thus giving it a participial form.

  • There was the tram line, if m'sieur did not care to take a fiacre.

    The Black Bag Louis Joseph Vance
  • I can't keep my mind on m' fishing—just wondering what the deuce he's after.

    Good Indian B. M. Bower
  • We-e-ell, yuh see, m' son, it's my business to mind other people's business!

    Good Indian B. M. Bower
  • "You're across the dead line, m' son," said Stanley, with lazy significance.

    Good Indian B. M. Bower
British Dictionary definitions for m

m

/ɛm/
noun (pl) m's, M's, Ms
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

m

symbol
1.
metre(s)
2.
mile(s)
3.
milli-
4.
minute(s)

M

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
10.
(in Australia)
  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.
(Roman numeral) 1000 See Roman numerals
abbreviation
15.
Malta (international car registration)

m-

prefix
1.
short for meta- (sense 4)

m-

prefix
1.
indicating the use of mobile-communications technology: m-banking

m.

abbreviation
1.
(cricket) maiden (over)
2.
male
3.
mare
4.
married
5.
masculine

M.

abbreviation
1.
Majesty
2.
(in titles) Member
3.
million
4.
(French) Also M, (pl) MM, MM. Monsieur
5.
mountain
Word Origin
sense 4) French equivalent of Mr

M'-

prefix
1.
a variant of Mac-

'm

contraction
1.
(verb) am
2.
(noun) madam: yes'm

Mc-

prefix
1.
a variant of Mac-
Usage note
For names beginning with this prefix, see under Mac-

mu1

/mjuː/
noun
1.
the 12th letter in the Greek alphabet (Μ, μ), a consonant, transliterated as m

mu2

abbreviation
1.
Mauritius

MU

abbreviation
1.
Musicians' Union

Mac-

prefix
1.
(in surnames of Scottish or Irish Gaelic origin) son of: MacDonald, MacNeice
Word Origin
from Goidelic mac son of; compare Welsh mab, Cornish mab
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
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Word Origin and History for m

M

13th letter, from Greek mu, from Semitic mem. The Roman symbol for 1,000; sometimes used in this sense in English 15c.-16c.; but in late 20c. newspaper headlines it stands for million. As a thickness of type, from 1680s.

Mac-

common element in Scottish and Irish names, from Old Celtic *makko-s "son." Cognate root *makwos "son" produced Old Welsh map, Welsh mab, ap "son;" also probably cognate with Old English mago "son, attendant, servant," Old Norse mögr "son," Gothic magus "boy, servant," Old English mægð "maid" (see maiden).

Online Etymology Dictionary, © 2010 Douglas Harper
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m in Medicine

m abbr.

  1. mass

  2. meter

M 2
abbr.

  1. molar

  2. molarity

  3. morgan

  4. myopia

m- abbr. often m-
meta-

mu (myōō, mōō)
n.

Symbol μ The 12th letter of the Greek alphabet. adj.
Of, relating to, or being a polypeptide chain that is one of five types of heavy chains present in immunoglobins.

Mu abbr.
Mache unit

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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m in Science
m  
Abbreviation of mass, meter
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Slang definitions & phrases for m

M

noun

  1. Morphine: You've got to get M to get that tingle-tingle (1912+ Narcotics)
  2. Marijuana (1960+ Narcotics)

mu

Related Terms

mooter

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
Cite This Source

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