keep (something) under one's hat

idiom

Definition of keep (something) under one's hat

: to keep (something) secret : to not tell anyone about (something) I'll tell you what happened, but you have to keep it under your hat.

Learn More about keep (something) under one's hat

Statistics for keep (something) under one's hat

Cite this Entry

“Keep (something) under one's hat.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/keep%20%28something%29%20under%20one%27s%20hat. Accessed 1 Oct. 2020.

Comments on keep (something) under one's hat

What made you want to look up keep (something) under one's hat? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Challenging Vocabulary Quiz Returns!

  • stylized drawing of woman pole vaulting across gap to get trophy
  • Which is a synonym of fuliginous?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Citation

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!