1. (

• obtuse

) of an angle; between 90 and 180 degrees ;

2. (

• obtuse

) (of a leaf shape) rounded at the apex ;

3. (

• obtuse ,
• purblind

) 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. (

• dense ,
• dim ,
• dull ,
• dumb ,
• obtuse ,
• slow

) 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" ;