/ Dictionary / Index I infantine: Meaning and Definition of Find definitions for: in•fan•tine Pronunciation: (in'fun-tīn", -tin), [key] — adj. infantile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. infantilize infantry 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