/ Dictionary / Index R refractive: Meaning and Definition of Find definitions for: re•frac•tive Pronunciation: (ri-frak'tiv), [key] — adj. of or pertaining to refraction. having power to refract. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: refractive (Thesaurus) refraction refractive index Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language