1. of an angle; between 90 and 180 degrees

2. (of a leaf shape) rounded at the apex

Similar word(s): simple, unsubdivided

3. lacking in insight or discernment

- too obtuse to grasp the implications of his behavior

Similar word(s): undiscerning, purblind

4. slow to learn or understand; lacking intellectual acuity

- he was either normally stupid or being deliberately obtuse

Similar word(s): stupid, dense, dim, dull, dumb, slow