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  

symbol

1. metre(s)

2. mile(s)

3. milli-

4. minute(s)

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'm ³ British  

contraction

1. (verb) am

2. (noun) madam

   yes'm

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m- ⁴ British  

prefix

1. indicating the use of mobile-communications technology

   m-banking

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m- ⁵ British  

prefix

1. short for meta-

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M ⁶ 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. ⁷ British  

abbreviation

1. cricket maiden (over)

2. male

3. mare

4. married

5. masculine

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M'- ⁸ British  

prefix

1. a variant of Mac-

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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

Here, E again represents energy, m is the particle's mass, and c is the speed of light.

From Science Daily • Mar. 10, 2026

These animals were 'crocodile-like' relatives of today's salamanders and frogs and could reach lengths of up to 2 m.

From Science Daily • Feb. 25, 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

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

You don’t think of it as a story. m Well, if I don’t yet have a whole story, I do have a life.

From "Taste of Salt: A Story of Modern Haiti" by Frances Temple