/ Dictionary / Index A angle of refraction: Meaning and Definition of Find definitions for: an'gle of refrac'tion Pronunciation: [key] — Physics, Optics. Physics,Optics. the angle between a refracted ray and a line drawn normal to the interface between two media at the point of refraction. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. angle of reflection angle of repose Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language