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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.

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m ² American  

Symbol, Electricity.

1. magnetic pole strength.

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'm ³ American  

[m] / m /

1. contraction of am.

   I'm not thirsty.

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M ⁴ American  

[em] / ɛm /

Or m

noun

plural

M's, Ms, m's, 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.

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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.

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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.

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M'- ⁷ American  

1. variant of Mac-.

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m- ⁸ American  

1. meta-.

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

   m-commerce; m-business.

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M- ⁹ American  

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

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m. ¹⁰ American  

abbreviation

1. noon.

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m. ¹¹ American  

abbreviation

1. (in prescriptions) mix.

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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.

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M. ¹³ American  

Or m.

abbreviation

1. noon.

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M. ¹⁴ American  

abbreviation

plural

MM

1. Majesty.

2. Manitoba.

3. markka; markkaa.

4. Marquis.

5. Music. measure.

6. medicine.

7. medium.

8. meridian.

9. Monday.

10. Monsieur.

11. mountain.

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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

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'm ² British  

contraction

1. (verb) am

2. (noun) madam

   yes'm

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m ³ British  

symbol

1. metre(s)

2. mile(s)

3. milli-

4. minute(s)

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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

10. 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

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abbreviation

1. Malta (international car registration)

m- ⁵ British  

prefix

1. short for meta-

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M'- ⁶ British  

prefix

1. a variant of Mac-

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m- ⁷ British  

prefix

1. indicating the use of mobile-communications technology

   m-banking

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m. ⁸ British  

abbreviation

1. cricket maiden (over)

2. male

3. mare

4. married

5. masculine

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M. ⁹ British  

abbreviation

1. Majesty

2. (in titles) Member

3. million

4. Also: M.  Monsieur

5. mountain

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m Scientific  

1. Abbreviation of mass, meter

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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

“Overall, this was a mixed-to-negative print: revenue was only modestly light, but profitability and cash flow were the real issues,” wrote Vinci Zhang, a research analyst at data firm M Science.

From Barron's • May 12, 2026

Speaking to BBC Sport from the $228 million Arthur M Blank training complex, which opens this week, Batson said "think of it as St George's Park, but slightly bigger and obviously newer".

From BBC • May 6, 2026

"The connection between synthesis planning and mechanisms is very exciting: we usually use mechanisms to discover new reactions that enable us to synthesize new molecules," says Andres M Bran.

From Science Daily • May 5, 2026

John Tomlinson, co-chief research officer at data firm M Science, said last week that multiple sources his firm tracks pointed to decent trends well into April.

From The Wall Street Journal • May 4, 2026

We’d made it to M when she looked up from Webster and said, “I smells smoke.”

From "The Teacher’s Funeral" by Richard Peck