| Adj. | 1. | obtuse - of an angle; between 90 and 180 degreesacute - of an angle; less than 90 degrees | |
| 2. | obtuse - of a leaf shape; rounded at the apexunsubdivided, simple - (botany) of leaf shapes; of leaves having no divisions or subdivisions | |
| 3. | obtuse - 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 Griffin | |
| 4. | obtuse - 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"stupid - lacking or marked by lack of intellectual acuity | |