Meaning of know in English
1. have clearly in the mind or memory
Do you know the name of this flower?
I know I left my phone, but where is it now?
3. be or become aware of something
It was dark before I knew it.
4. have learned a lot about something
He knows nothing at all about computers.
5. be familiar with a person, place etc.
Do you know her?
6. recognize as different or the same
He knows good from bad.― He knows right from wrong.