Ob-tūse', a.

a. [compar. OBTUSER; superl. OBTUSEST.] [Lat. obtusus, p. p. of obtundere, obtusum, to blunt; Fr. obtus, Sp. obtuso, It. ottuso. See OBTUND.]

1. Not pointed or acute; blunt;— applied to angles greater than a right angle, or containing more than ninety degrees.
2. Not having acute sensibility; dull; as, obtuse senses. Milton. A B C, obtuse angle; D B C, right angle.
3. Not sharp or shrill; dull; obscure; as, obtuse sound.