Definition of M in English:

M

(also m)

noun

  • 1The thirteenth letter of the alphabet.

    • ‘I'm 30 and have had the exact same problem for many years -- and only just recently realized dilemma has two M's and no N.’
    • ‘Remember, his name has two M's in it.’
    1. 1.1 Denoting the next after L in a set of items, categories, etc.
  • 2The Roman numeral for 1,000.

    • ‘What number equals the Roman numeral M?’
    • ‘The Roman numerals C and M sometimes did not mean 100 or 1000 (see hundred).’

Pronunciation:

M

/ɛm/