Source : Webster's Revised Unabridged Dictionary (1913)

Obtuse \Ob*tuse"\ a. [Compar. {Obtuser}; superl. {Obtusest}.]
   [L. obtusus, p. p. of obtundere to blunt: cf. F. obtus. See
   {Obtund}.]
   1. Not pointed or acute; blunt; -- applied esp. to angles
      greater than a right angle, or containing more than ninety
      degrees.

   2. Not having acute sensibility or perceptions; dull; stupid;
      as, obtuse senses. --Milton.

   3. Dull; deadened; as, obtuse sound. --Johnson.