/ Dictionary / Index S solid angle: Meaning and Definition of Find definitions for: sol'id an'gle Pronunciation: [key] — Geom. Geom. an angle formed by three or more planes intersecting in a common point or formed at the vertex of a cone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. solid solidarity Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language