/ Dictionary / Index J jill: Meaning and Definition of Find definitions for: jill Pronunciation: ( jil), [key] — n. Slang. a girl or young woman. a sweetheart. Jill Pronunciation: ( jil), [key] — n. a female given name, form of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Jilin jillet Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language