/ Dictionary / Index Y yack: Meaning and Definition of Find definitions for: yack Pronunciation: (yak), [key] — v.i., n. Slang. yak. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: yack (Thesaurus) yachtswoman yackety-yak Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language