/ Dictionary / Index M mom: Meaning and Definition of Find definitions for: mom Pronunciation: (mom), [key] — n. Informal. mother. m.o.m. Pronunciation: [key] middle of month. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mom (Thesaurus) molybdous mom-and-pop Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language