/ Dictionary / Index I in-and-in: Meaning and Definition of Find definitions for: in-and-in Pronunciation: (in'und-in', -un-), [key] — adv. repeatedly within the same family, strain, etc.: to breed stock in-and-in. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. inamorato in-and-out Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language