know it

phrase

: to be aware of something
It's wrong and you know it!

Browse Nearby Words

knowingness
know it
know-it-all
See all Nearby Words

Cite this Entry

“Know it.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20it. Accessed 14 Mar. 2026.

Copy Citation
Love words? Need even more definitions?

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

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of rash

See Definitions and Examples »

Popular in Grammar & Usage

See More

More Words You Always Have to Look Up

5 Verbal Slip Ups and Language Mistakes

Is it 'nerve-racking' or 'nerve-wracking'?

The Difference Between 'i.e.' and 'e.g.'

Democracy or Republic: What's the difference?
See More

Popular in Wordplay

See More

The Opposite of Déjà Vu

The Words of the Week - Mar. 13

Was 'nervous Nellie' a Real Person?

Why do we call it a 'flea market'?

17 Words for Dog Breeds
See More

Popular

See More

More Words You Always Have to Look Up

The Opposite of Déjà Vu

The Words of the Week - Mar. 13
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
book-magic-glow
Famous Novels, First Lines Quiz Can you identify these novels by their famous fir...
See All