The Britannica Dictionary mobile search

×

The Britannica Dictionary

knucklehead

1 ENTRIES FOUND:

knucklehead (noun)

knucklehead /ˈnʌkəlˌhɛd/ noun

plural knuckleheads

knucklehead

/ˈnʌkəlˌhɛd/

noun

plural knuckleheads

Britannica Dictionary definition of KNUCKLEHEAD

[count] US, informal

: a stupid person : dummy

Don't be such a knucklehead.

[+] more examples [-] hide examples [+] Example sentences [-] Hide examples

ASK THE EDITOR

What are the meanings of especially and specially?

See the answer »

QUIZZES

Vocabulary Quiz Icon

Vocabulary Quiz

Test your word power

Take the Quiz »

Name That Thing Icon

Name That Thing

Take our visual quiz

Test Your Knowledge »

WORD OF THE DAY

Overpowering Illustration

: very strong or powerful

Learn More »