Of an angle: greater than 90 degrees but less than 180 degrees. (adjective)
Of a triangle: with one obtuse angle. (adjective)
Examples of word obtuse
Scalia rejected what he called the "obtuse" argument by the attorneys for consumers who challenged CompuCredit that Congress had not intended for companies to force disputes into binding arbitration.
You need a new thesaurus, your reliance on the word obtuse is getting annoying.
All he’s doing is what all of you phonies do – speak in obtuse generalities.
Oh and maybe the reason they’re all quite obtuse is that being in a chick-lit novel themselves they never read chick-lit, or seen a chick-flick and so don’t come to recognise the signals like the rest of us?
“I don’t much like hearing him called obtuse and superficial, but I suppose I should like still less to hear Sybell praise him.