Etymology : Middle English, from Latin obtusus blunt, dull, from past participle of obtundere to beat against, blunt, from ob- against + tundere to beat; more at OB-, CONTUSION
Pronunciation : äb-'tüs, &b-, -'
Function : adjective
Date : 15th century
1. slow, foolish, stupid; blunt; of an angle between 90 and 180 degrees (Geometry); having blunt-tipped leaves (Botany). obtuse\ob*tuse"\ . a. [compar. obtuser ; superl. obtusest.] [l. obtusus, p. p. of obtundere to blunt: cf. f. obtus. see:
obtund.].
2. not pointed or acute; blunt; -- applied esp. to angles greater than a right angle, or containing more than ninety degrees.
3. not having acute sensibility or perceptions; dull; stupid; as, obtuse senses.
4. dull; deadened; as, obtuse sound. [obtuse adj.
5. of an angle; between 90 and 180 degrees [ant: acute].
6. of a leaf shape; rounded at the apex.
7. 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 [syn: purblind].
8. 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" [syn: dense, dim, dull, dumb, slow].
9. Not pointed or acute; blunt; applied esp. to angles greater than a right angle, or containing more than ninety degrees.
10. Not having acute sensibility or perceptions; dull; stupid; as, obtuse senses.
11. Dull; deadened; as, obtuse sound. 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 of an angle; between 90 and 180 degrees of a leaf shape; rounded at the apex.
12. 1. Someone who is obtuse has difficulty understanding things, or makes no effort to understand them. I've really been very obtuse and stupid + obtuseness ob·tuse·ness Naivety bordering on obtuseness helped sustain his faith.
13. An obtuse angle is between 90° and 180°. Compare acute angle. slow to understand things, in a way that is annoying (obtusus , from obtundere ).