/ Dictionary / Index E expansive bit: Meaning and Definition of Find definitions for: expan'sive bit" Pronunciation: [key] — Carpentry. Carpentry. an adjustable bit for drilling holes of different sizes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. expansive expansive classification Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language