/ Dictionary / Index B bimestrial: Meaning and Definition of Find definitions for: bi•mes•tri•al Pronunciation: (bī-mes'trē-ul), [key] — adj. occurring every two months; bimonthly. lasting two months. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bimestrial (Thesaurus) bimester bimetal 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