/ Dictionary / Index R rigour: Meaning and Definition of Find definitions for: rig•our Pronunciation: (rig'ur), [key] — n. Chiefly Brit. rigor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rigour (Thesaurus) rigorous Rigsdag Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language