Adjective
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 behavior""a purblind oligarchy that flatly refused to see that history was condemning it to the dustbin"- Jasper Griffin4. slow to learn or understand; lacking intellectual acuity;
"so dense he never understands anything I say to him""never met anyone quite so dim""although dull at classical learning, at mathematics he was uncommonly quick"- Thackeray"dumb officials make some really dumb decisions""he was either normally stupid or being deliberately obtuse""worked with the slow students"