definition of
obtuse

[1] #1 obtuse s. (of a leaf shape) rounded at the apex. wn

[2] #2 obtuse s. [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. wn

[3] #3 obtuse s. [dense, dim, dull, dumb, 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 mak. wn