- m
- /em/ M's, m's noun (C)
1 the 13th letter of the English alphabet2 the number 1000 in the system of roman numeralsM BrE the abbreviation of motorway: M25 | M1 m the written abbreviation ofa) metreb) milec) milliond) malee) marriedf) medium
Longman dictionary of contemporary English. 2004.