Main entry: dim, dense, dull, dumb, obtuse, slow
Definition: slow to learn or understand; lacking intellectual acuity
Usage: 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
Definition: lacking in insight or discernment
Usage: 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
Main entry: obtuse
Definition: of an angle; between 90 and 180 degrees
Main entry: obtuse
Definition: (of a leaf shape) rounded at the apex