/ Dictionary / Index M Mbm: Meaning and Definition of Find definitions for: Mbm Pronunciation: [key] one thousand feet, board measure. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mbira MBO Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language