Dictionary

thinking cap

noun

—used to refer to the act of trying to solve a problem by thinking carefully about it

Full Definition of THINKING CAP

:  a state or mood in which one thinks —usually used in the phrase put one's thinking cap on
ADVERTISEMENT

First Known Use of THINKING CAP

1847

Browse

Next Word in the Dictionary: thinking–machinePrevious Word in the Dictionary: thinking All Words Near: thinking cap
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears