you don't know

idiom

Definition of you don't know

used for emphasis You don't know how happy I am to see you.

Learn More about you don't know

Statistics for you don't know

Cite this Entry

“You don't know.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/you%20don%27t%20know. Accessed 3 Mar. 2021.

Style: MLA
MLA Chicago APA Merriam-Webster

Comments on you don't know

What made you want to look up you don't know? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

February 2021 Words of the Day Quiz

  • squirrel in winter
  • Which is a synonym of perdure?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
 AlphaBear 2

Spell words. Make bears.

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!