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1. Of an angle; between 90 and 180 degrees
    
2. (of a leaf shape) rounded at the apex
    
3. Lacking in insight or discernment
   "too obtuse to grasp the implications of his behaviour"
   - purblind
    
4. Slow to learn or understand; lacking intellectual acuity
   "he was either normally stupid or being deliberately obtuse"
   - dense, dim, dull, dumb, slow

Derived forms: obtusest, obtuser

See also: obtusely, obtuseness, simple, stupid, undiscerning, unsubdivided

Antonym: acute

Encyclopedia: Obtuse