/ Dictionary / Index G gibbosity: Meaning and Definition of Find definitions for: gib•bos•i•ty Pronunciation: (gi-bos'i-tē), [key] — n. the state of being gibbous. a protuberance or swelling. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: gibbosity (Thesaurus) Gibbons gibbous Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language