Obtuse superl. : Not pointed or acute; blunt; -- applied esp. to angles greater than a right angle, or containing more than ninety degrees.

Obtuse superl. : Not having acute sensibility or perceptions; dull; stupid; as, obtuse senses.

Obtuse superl. : Dull; deadened; as, obtuse sound.

Example:
How do you determine the radian measure of an Obtuse angle?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, webster, beat, Word Games, Webster Online Dictionary with audio pronunciations, Middle English, thesaurus, obtuse triangle, glossary, language, ESL, Search, äb, adjective, Inflected, Etymology, Latin.

Defination from the web:
obtuse from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... 90 degrees but less than 180 degrees (2) : having an obtuse angle <an obtuse triangle> — see triangle illustration c of a leaf : rounded at the free end ...