Meaning of M in English

[m] n, pl m's or ms often cap, often attrib (bef. 12c) 1 a: the 13th letter of the English alphabet b: a graphic representation of this letter c: a speech counterpart of orthographic m

2: one thousand in Roman numerals

3: a graphic device for reproducing the letter m

4: one designated m esp. as the 13th in order or class

5: something shaped like the letter M

6. a: em

2. b: pica


Merriam-Webster English vocab.      Английский словарь Merriam Webster.