obtuse

[ uhb-toos, -tyoos ]
/ əbˈtus, -ˈtyus /

adjective

not quick or alert in perception, feeling, or intellect; not sensitive or observant; dull.
not sharp, acute, or pointed; blunt in form.
(of a leaf, petal, etc.) rounded at the extremity.
indistinctly felt or perceived, as pain or sound.

Origin of obtuse

1500–10; < Latin obtūsus dulled (past participle of obtundere), equivalent to ob- ob- + tūd-, variant stem of tundere to beat + -tus past participle suffix, with dt > s

Related forms

Can be confused

abstruse obtuse
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for obtuse

British Dictionary definitions for obtuse

obtuse

/ (əbˈtjuːs) /

adjective

mentally slow or emotionally insensitive
maths
  1. (of an angle) lying between 90° and 180°
  2. (of a triangle) having one interior angle greater than 90°
not sharp or pointed
indistinctly felt, heard, etc; dullobtuse pain
(of a leaf or similar flat part) having a rounded or blunt tip

Derived Forms

obtusely, adverbobtuseness, noun

Word Origin for obtuse

C16: from Latin obtūsus dulled, past participle of obtundere to beat down; see obtund
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for obtuse

obtuse

[ ŏb-tōōs, əb- ]

adj.

Lacking quickness of perception or intellect.
Not sharp or acute; blunt.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.