/ Dictionary / Index S Schwarzschild radius: Meaning and Definition of Find definitions for: Schwarz'schild ra"dius Pronunciation: (Ger. shvärts'shilt" Eng. shwôrts'chīld", -shild), [key] — Astron. Astron. the radius at which a gravitationally collapsing celestial body becomes a black hole. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Schwarzkopf Schwarzwald Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language