Breadcrumb Home > Dictionary > Index R restriction: Meaning and Definition of Find definitions for: re•stric•tion Pronunciation: (ri-strik'shun), [key] — n. something that restricts; a restrictive condition or regulation; limitation. the act of restricting. the state of being restricted. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: restriction (Thesaurus) restricted stock restriction enzyme ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language