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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
First recorded in 1870-75 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for thinking cap
Historical Examples
  • Just let me put on my thinking cap, and I'll fix 'em, and don't you forget it!

    The Rover Boys on the Farm Arthur M. Winfield (AKA Edward Stratemeyer)
  • I shall have to put on my thinking cap when you ask me any more, Laddie.

  • Well, after that remark there was nothing Jimmy Rabbit could do except to put on his thinking cap.

    The Tale of Nimble Deer Arthur Scott Bailey
  • So I put on my thinking cap, and I soon learned of a very zealous antiquary living about five miles from where I was stopping.

    Joe The Hotel Boy Horatio Alger Jr.
  • Deadwood Dick withdrew from the edge of the ledge then, and put on his thinking cap.

    Deadwood Dick Jr. Branded Ed. L. Wheeler
  • "And about this wedding license, I'll put on my thinking cap," remarked Granny.

    The Amazing Inheritance Frances R. Sterrett
  • Well, I put my thinking cap on, and I began to wonder whether I could manage to keep you with me always.'

    The Bountiful Lady Thomas Cobb
  • Now you put your thinking cap on and invent a name, something romantic and pretty.

    The Imaginary Marriage Henry St. John Cooper
  • Ben Jolly sat chewing a toothpick vigorously, his thinking cap on.

  • Your thinking cap isnt on straight to-day, or you wouldnt have let Fairspeckle pull the wool over your eyes the way he did.

    The Gray Phantom Herman Landon
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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