(telecommunications) Initialism of Earth-Moon-Earth.

(obsolete outside Scotland) An uncle. / (Scotland) Friend.

Indicating a fundamental unit in some kind of structure, chiefly linguistic structure.

(US, slang) The Mexican Mafia.

The name of the Latin-script letter M. / (typography) A unit of measurement equal to the height of the type in use.

Alternative form of 'em

(rare, nonstandard, proscribed) A gender-neutral third-person singular object pronoun, the objective case of ey, equivalent to the singular them and coordinate with him and her.

(Scotland, Ireland) a form of hesitant speech, or an expression of uncertainty; um; umm; erm

The form taken by en- before the labial consonants b and p, as it assimilates place of articulation.

(business) electronics manufacturing service: a type of OEM (original equipment manufacturer) service.