1 dull-witted; slow to understand.
2 of blunt form; not sharp-pointed or sharp-edged.
3 (of an angle) more than 90° and less than 180°.
4 (of pain or the senses) dull; not acute.
Derivatives:
obtusely adv. obtuseness n. obtusity n.
Etymology: L obtusus past part. (as OBTUND)
Useful english dictionary. 2012.