/ Dictionary / Index B big wheel: Meaning and Definition of Find definitions for: big' wheel' Pronunciation: [key] — Informal. Informal. an influential or important person: a big wheel in business. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. big tree bigwig Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language