Definition of "Know" :
noun: the fact of being aware of information that is known to few people
"He is always in the know."
verb: accept (someone) to be what is claimed or accept his power and authority
"The Crown Prince was acknowledged as the true heir to the throne."
verb: be familiar or acquainted with a person or an object
"She doesn't know this composer."
verb: be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
"I know that the President lied to the people."
verb: be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
"I know that I left the key on the table."
verb: know how to do or perform something
"She knows how to knit."
verb: have fixed in the mind
"I know Latin."
verb: have firsthand knowledge of states, situations, emotions, or sensations
"I know the feeling!."
verb: perceive as familiar
"I know this voice!."
verb: be able to distinguish, recognize as being different
"The child knows right from wrong."
verb: know the nature or character of
verb: have sexual intercourse with