thinking cap

noun

1. a state of mind marked by reflection or concentration:

   If we put on our thinking caps, we may come up with the answer.

Word History and Origins

Origin of thinking cap¹

First recorded in 1870–75

Idioms and Phrases

see put on one's thinking cap .

Example Sentences

Bring your boogie shoes — and your thinking caps.

From Los Angeles Times

With jolly maximalism and Shrinky Dinks shadings, this is a book that invites children to take off their thinking caps, relax and revel in pure silliness.

From New York Times

“Use your common sense and put your thinking caps on,” she instructed jurors.

From Los Angeles Times

And that’s all well and good, but it’s not a great bet young kids will come away with that new feather in their thinking caps.

From Los Angeles Times

It’s the biggest week of the high school football season, so let me peek into my crystal ball, put on my thinking cap and come up with some predictions for the biggest games.

From Los Angeles Times