crackbrain

noun
crack·​brain | \ ˈkrak-ˌbrān How to pronounce crackbrain (audio) \

Definition of crackbrain

: an erratic person : crackpot

Keep scrolling for more

Other Words from crackbrain

crackbrained \ ˈkrak-​ˈbrānd How to pronounce crackbrain (audio) \ adjective

Synonyms for crackbrain

Synonyms

Visit the Thesaurus for More 

Examples of crackbrain in a Sentence

once a brilliant dancer, he died a crackbrain in a mental institution a crackbrain who wore bedroom slippers to the grocery shop

First Known Use of crackbrain

circa 1570, in the meaning defined above

Keep scrolling for more

Learn More about crackbrain

Time Traveler for crackbrain

Time Traveler

The first known use of crackbrain was circa 1570

See more words from the same year

Statistics for crackbrain

Cite this Entry

“Crackbrain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/crackbrain. Accessed 11 May. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on crackbrain

Thesaurus: All synonyms and antonyms for crackbrain

Comments on crackbrain

What made you want to look up crackbrain? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Star Wars Words Quiz

  • cu jedi training
  • The bounty portion of bounty hunters (such as Boba Fett) comes from a Latin word meaning
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!