/ Dictionary / Index B by-form: Meaning and Definition of Find definitions for: by-form Pronunciation: (bī'fôrm"), [key] — n. Ling. a closely related and sometimes less frequent form, as spelt for spelled; variant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Byelostok bygone 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