/ Dictionary / Index L life buoy: Meaning and Definition of Find definitions for: life' bu"oy Pronunciation: [key] any of variously formed buoyant devices for supporting a person fallen into the water. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. lifeboatman life car Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language