/ Dictionary / Index G Gillian: Meaning and Definition of Find definitions for: Gil•li•an Pronunciation: (jil'ē-un, -yun), [key] — n. a female given name, form of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gill fungus gillie Related Content Daily Word Quiz: meritocracy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language