/ Dictionary / Index B Billy the Kid: Meaning and Definition of Find definitions for: Bil'ly the Kid' Pronunciation: [key] (William H. Bonney) 1859–81, U.S. outlaw. (italics) a ballet (1938) choreographed by Eugene Loring, with musical score by Aaron Copland. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. billy goat bilobate Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language