/ Dictionary / Index B bimester: Meaning and Definition of Find definitions for: bi•mes•ter Pronunciation: (bī-mes'tur, bī'mes-), [key] — n. a two-month period. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bimester (Thesaurus) bimensal bimestrial Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language