(of a person) dull-witted; stupid.
(of an animal) having a thick head.

Origin of thickheaded

First recorded in 1700–10; thick + headed
Related formsthick·head·ed·ly, adverbthick·head·ed·ness, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for thickheaded

dense, dull, dumb, idiotic, stupid, boneheaded

Examples from the Web for thickheaded

Historical Examples of thickheaded

  • For a' that, I've had thickheaded friends who've been grateful to me noo and then.

    The Coast of Adventure

    Harold Bindloss

  • Nobody but such a thickheaded ass as I am would have gone on all this time without seeing how the game stood.

    Frank Fairlegh

    Frank E. Smedley

  • The blow would have crushed the skull of any white man, but it seemed hardly to stun the thickheaded savage.

  • Has not he thickheaded ignorant boors; lazy, enslaved farmers, weedy lands?

    Past and Present

    Thomas Carlyle