1. slow to understand; lacking sharpness of mind
2. measuring more than 90 degrees but less than 180 degrees
Usage: geometry

Examples

• He was being deliberately obtuse about the obvious solution.
• The student seemed obtuse when it came to understanding basic math concepts.
• Don’t be so obtuse – you know exactly what I mean.
• The obtuse angle measured 120 degrees.
• In geometry class, we learned to identify obtuse triangles.
• Her obtuse response showed she wasn’t paying attention.
• The obtuse corner of the building created an awkward space.