1
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
1
: to have knowledge
2
: to be or become cognizant
—sometimes used interjectionally with you especially as a filler in informal speech
see also:
Examples of know in a Sentence
Verb
He knows a lot about the history of the town.
Do you know the answer?
I don't know her name.
Do you know what time it is?
I don't know the words to that song.
They knew a good deal about the problem.
She knows the rules of the game.
If you want the answer, ask someone who knows.
I don't know much about art, but I know what I like.
She knows that many people will not believe her.
Recent Examples on the Web
Jijo Malayil, Interesting Engineering, 19 Mar. 2026
Don’t miss what’s happening People on X are the first to know.
—X (formerly Twitter), 19 Mar. 2026
Rebecca Deurlein, Southern Living, 16 Mar. 2026
Iranian President Masoud Pezeshkian’s son, a government adviser, wrote later that Mojtaba was injured but in a safe place and doing well based on reports from those in the know.
—Leila Gharagozlou, CNN Money, 14 Mar. 2026
See All Example Sentences for know
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show current usage.
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Verb
Next-gen atomic clock The breakthrough in miniaturisation is enabled by a quantum-optical technique known as coherent population trapping, which replaces the bulkier microwave-cavity approach used in traditional atomic clocks.
—Jijo Malayil, Interesting Engineering, 19 Mar. 2026
Don’t miss what’s happening People on X are the first to know.
—X (formerly Twitter), 19 Mar. 2026
Noun
After all, everyone deserves a break, and in this less touristy corner of San Antonio, locals and visitors in the know are happy to embrace the culture without the chaos.
—Rebecca Deurlein, Southern Living, 16 Mar. 2026
Iranian President Masoud Pezeshkian’s son, a government adviser, wrote later that Mojtaba was injured but in a safe place and doing well based on reports from those in the know.
—Leila Gharagozlou, CNN Money, 14 Mar. 2026
See All Example Sentences for know
Cite this Entry
“Know.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know. Accessed 23 Mar. 2026.
Copy CitationKids Definition
know
1 of 2 verb1
a
: to have understanding of
know yourself
b
: to recognize the nature of
knew them to be honest
2
a
: to recognize the identity of
knew me by my walk
b
: to be acquainted or familiar with
knows the city very well
3
a
: to be aware of the truth of
know that the earth is round
b
: to have a practical understanding of
knows how to write
4
: to have information or knowledge
ask someone who knows
5
: to be or become aware
knew about the problem
know
2 of 2 noun
: the fact of knowing : knowledge
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