know (verb) past tense: knew LISTEN
If you know something, it means that you are aware of a fact and you are sure that it is true.
- Do you know the capital of Peru?
- I know that you don't like me.
If you know someone, it means that you have met them before.
- Yes, I know Alison. She's my boss.
If you know how to do something, it means that you can do it because you have learned to do it.
- He doesn't know how to swim.
If you know something, it can also mean that you have seen or heard it before.
- I know this song. It's by the Beatles.
When we want someone to give us some information about something, we often ask them to let us know about it. For example, “Let me know what time you’ll arrive.”
In pop culture
Dionne Warwick’s 1968 song “Do You Know the Way to San José” is about a woman who lived in San José, California, and wants to go back. (The “way” is how to get to a place.) She sings about why she likes San José and why it is better than Los Angeles, which we usually call LA.
There are other meanings of know.