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English definition of “obtuse”

obtuse

adjective  /əbˈtus, ɑb-/ us  

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)
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