/ Dictionary / Index F fatty: Meaning and Definition of Find definitions for: fat•ty Pronunciation: (fat'ē), [key] — adj., -ti•er, -ti•est. —adj. consisting of, containing, or resembling fat: fatty tissue. characterized by overproduction or excessive accumulation of fat. fat•ty Pronunciation: (fat'ē), [key] — pl. -ties. a person who is overweight or obese. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: fatty (Thesaurus) fattish fatty acid Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language