/ Dictionary / Index B bissextile: Meaning and Definition of Find definitions for: bis•sex•tile Pronunciation: (bī-seks'til, -tīl, bi-), [key] — adj. containing or noting the extra day of leap year: The years 1980 and 1984 were both bissextile. —n. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Bissau bissextus Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language