/ Dictionary / Index B biform: Meaning and Definition of Find definitions for: bi•form Pronunciation: (bī'fôrm"), [key] — adj. having or combining two forms, as a centaur or mermaid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: biform (Thesaurus) biforked Bifrost 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