1

know

verb \ ˈnō \
Updated on: 21 Nov 2017

Definition of know

knew play \ˈnü also ˈnyü\; known play \ˈnōn\; knowing
transitive verb
1 a (1) : to perceive directly : have direct cognition of
(2) : to have understanding of
  • importance of knowing oneself
(3) : to recognize the nature of : discern
b (1) : to recognize as being the same as something previously known
(2) : to be acquainted or familiar with
(3) : to have experience of
2 a : to be aware of the truth or factuality of : be convinced or certain of
b : to have a practical understanding of
  • knows how to write
3 archaic : to have sexual intercourse with
intransitive verb
1 : to have knowledge
2 : to be or become cognizant sometimes used interjectionally with you especially as a filler in informal speech

knowable

play \ˈnō-ə-bəl\ adjective

knower

play \ˈnō-ər\ noun
know from
: to have knowledge of
  • didn't know from sibling rivalry
  • —Penny Marshall

Examples of know in a Sentence

  1. He knows a lot about the history of the town.

  2. Do you know the answer?

  3. I don't know her name.

  4. Do you know what time it is?

  5. I don't know the words to that song.

  6. They knew a good deal about the problem.

  7. She knows the rules of the game.

  8. If you want the answer, ask someone who knows.

  9. I don't know much about art, but I know what I like.

  10. She knows that many people will not believe her.

Recent Examples of know from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'know.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of know

Middle English, from Old English cnāwan; akin to Old High German bichnāan to recognize, Latin gnoscere, noscere to come to know, Greek gignōskein

know Synonyms


2

know

noun

Definition of know

in the know
: in possession of exclusive knowledge or information; broadly : well-informed

Recent Examples of know from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'know.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of know

see 1know


KNOW Defined for Kids

know

verb \ ˈnō \

Definition of know for Students

knew \ˈnü, ˈnyü\; known \ˈnōn\; knowing
1 : to recognize the identity of
  • I know that guy!
2 : to be aware of the truth of
  • We know that the earth is round.
3 : to have a practical understanding of
  • Her little sister already knows how to read.
4 : to have information or knowledge
  • He knows all about cars.
5 : to be or become aware
  • The president knew about the problem.
6 : to be acquainted or familiar with
  • A taxi driver knows the city well.
7 : to have understanding of
  • It's important to know yourself.
  • I don't know why this happens.
8 : to recognize the nature of
  • We knew them to be honest.


Seen and Heard

What made you want to look up know? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

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

WORD OF THE DAY

food, provisions, or a tasty dish

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Syn City

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!