/ Dictionary / Index H hairball: Meaning and Definition of Find definitions for: hair•ball Pronunciation: (hâr'bôl"), [key] — n. a ball of hair accumulated in the stomach or intestines of a cat or other animal as a result of the animal's licking its coat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hairball (Thesaurus) hair hairbrained Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language