/ Dictionary / Index R radiative: Meaning and Definition of Find definitions for: ra•di•a•tive Pronunciation: (rā'dē-ā"tiv), [key] — adj. giving off radiation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. radiation therapy radiative capture Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language