Meaning of “obtuse” in the English Dictionary

(Definition of “obtuse” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"obtuse" in American English

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us /əbˈtus, ɑb-/

obtuse adjective (ANGLE)

geometry (of an angle) more than 90° and less than 180°, or (of a triangle) containing an angle of more than 90° and less than 180°

obtuse adjective (STUPID)

stupid or slow to understand:

I’m not trying to be obtuse, but I don’t get it.

(Definition of “obtuse” from the Cambridge Academic Content Dictionary © Cambridge University Press)