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.

COLLAPSE

Symbol.

the thirteenth in order or in a series, or, when I is omitted, the twelfth.

(sometimes lowercase) the Roman numeral for 1000. Compare Roman numerals.

Electricity. magnetization.

Biochemistry. methionine.

Physics. mass.

Finance. (of bonds) matured.

meter; meters.

Music. minor.

Symbol, Electricity. magnetic pole strength.

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

meta-.

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

variant of Mac-.

contraction of am: I'm not thirsty.

markka; markkaa.

Music. measure.

noon. Origin:
< Latin merīdiēs

10.

Monday.

11.

plural MM. Monsieur.

12.

mountain.

COLLAPSE

male.

(in Germany) mark; marks.

Physics. mass.

noon. Origin:
< Latin merīdiēs

10.

11.

12.

(in prescriptions) mix. Origin:
< Latin misce

13.

modification of.

14.

15.

16.

17.

18.

19.

Collins

World English Dictionary

m or M (ɛm)

—n , 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 or M

—n

m or M (ɛm)

—n , 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 or M

—n

m

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

M

—*symbol for*
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
	a. mature audience (used to describe a category of film certified as suitable for viewing by anyone over the age of 15)
	b. (as modifier): an M film
11.	logic the middle term of a syllogism
12.	physics mutual inductance
13.	chem molar
14.	Roman numeral See Roman numerals 1000

—*abbreviation for*
15.	Malta (international car registration)

'm

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

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source

Etymonline

Word Origin & History

from Gk. mu, from Semitic mem. The Roman symbol for 1,000; sometimes used in this sense in English 15c.-16c.; but in modern newspaper headlines it stands for million.

American Heritage

Medical Dictionary

m abbr.

mass
meter

M ²
abbr.

molar
molarity
morgan
myopia

m- abbr. often m-
meta-

American Heritage

Science Dictionary

m
Abbreviation of mass, meter

FOLDOC

Computing Dictionary

M definition

1. Alternative name for MUMPS.
2. A C-like language from Silicon Compiler Systems for multilevel hardware description. It is currently available in the GDT package from Mentor Graphics.
[Jargon File]
(1994-10-26)
3. The abbreviated for of mega-.
(1995-01-10)

American Heritage

Abbreviations & Acronyms