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thinking cap

a state of mind marked by reflection or concentration:
If we put on our thinking caps, we may come up with the answer.
Origin of thinking cap
1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for thinking-cap
Historical Examples
  • We are a little too inclined to doff the thinking-cap at the first opportunity.

    The Secrets of a Savoyard Henry A. Lytton
  • Now here's my idea that I evolved with my thinking-cap—I mean night-cap—on!

    Glory and the Other Girl Annie Hamilton Donnell
  • "And this head of mine would have to put on its thinking-cap," he pursued jovially.

    The Leavenworth Case Anna Katherine Green
  • Tell me what you know and then my 'thinking-cap' may be put on to some advantage.

    Kitty's Conquest Charles King
  • I will try to tell one if you will let me put on my thinking-cap for a moment.

  • In his mechanical work his inventive turn of mind always caused him to put on his thinking-cap when he faced an obstacle.

    Airship Andy Frank V. Webster
  • But I had my New England "thinking-cap" firmly set on my shoulders.

    Geraldine Farrar Geraldine Farrar
  • There was nothing for it but to bow to the inevitable, break my journey, and put my thinking-cap on.

Idioms and Phrases with thinking-cap

thinking cap

The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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