/ Dictionary / Index J jillet: Meaning and Definition of Find definitions for: jill•et Pronunciation: ( jil'it), [key] — n. Scot. a giddy or flirtatious girl or young woman. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. jill jillion Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language