/ Dictionary / Index F fatly: Meaning and Definition of Find definitions for: fat•ly Pronunciation: (fat'lē), [key] — adv. in the manner of a fat person; ponderously. richly: a fatly endowed foundation. with self-satisfaction; smugly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. fat lip Fat Man Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language