thinking cap

noun

Definition of thinking cap

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

1827

First Known Use of thinking cap

1827


THINKING CAP Defined for English Language Learners

thinking cap

noun

Definition of thinking cap for English Language Learners

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

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