cocksure

[ kok-shoor, -shur ]
/ ˈkɒkˈʃʊər, -ˈʃɜr /

adjective

perfectly sure or certain; completely confident in one's own mind: She was cocksure that she was able to do the job better than anyone else.
too certain; overconfident: He was so cocksure he would win the election that he didn't even bother to campaign.
Obsolete. perfectly secure or safe.

Origin of cocksure

First recorded in 1510–20; cock1 + sure

OTHER WORDS FROM cocksure

cock·sure·ly, adverb cock·sure·ness, noun

Example sentences from the Web for cocksure

British Dictionary definitions for cocksure

cocksure
/ (ˌkɒkˈʃʊə, -ˈʃɔː) /

adjective

overconfident; arrogant

Derived forms of cocksure

cocksurely, adverb cocksureness, noun

Word Origin for cocksure

C16: of uncertain origin