/ Dictionary / Index O obtuse angle: Meaning and Definition of Find definitions for: obtuse' an'gle Pronunciation: (ub-ts'ang'gyu-lur, -tys'), [key] an angle greater than 90° but less than 180°. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. obtuse obtuse bisectrix Related Content Daily Word Quiz: blithesome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language