thinking cap

noun

Definition of thinking cap

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

First Known Use of thinking cap

1827, in the meaning defined above

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The first known use of thinking cap was in 1827

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More Definitions for thinking cap

thinking cap

noun

English Language Learners Definition of thinking cap

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

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