/ Dictionary / Index Z zip-in: Meaning and Definition of Find definitions for: zip-in Pronunciation: (zip'in"), [key] — adj. capable of being inserted or attached by means of a zipper: a coat with a zip-in lining. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. zip gun Ziploc Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language