/ Dictionary / Index F fan belt: Meaning and Definition of Find definitions for: fan' belt" Pronunciation: [key] (in automotive vehicles) a belt, driven by the crankshaft of an engine, that turns a fan for drawing cooling air through the radiator. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fanback fancied Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language