/ Dictionary / Index W wacky: Meaning and Definition of Find definitions for: wack•y Pronunciation: (wak'ē), [key] — wack•i•er, wack•i•est. odd or irrational; crazy: They had some wacky plan for selling more books. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: wacky (Thesaurus) wacko Waco Related Content Daily Word Quiz: banshee Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language