/ Dictionary / Index S special theory of relativity: Meaning and Definition of Find definitions for: spe'cial the'ory of relativ'ity Pronunciation: [key] — Physics. Physics. See under(def. 2). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. special term specialty Related Content Daily Word Quiz: careening Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language