/ Dictionary / Index L looney: Meaning and Definition of Find definitions for: loon•ey Pronunciation: (l'nē), [key] — n., pl. loon•i•er, loon•i•est, loon•eys, loon•ies. loony. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: looney (Thesaurus) loon loony Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language