What is the meaning of Know?

To perceive the truth or factuality of; to be certain of; to be certain that.

To be or become aware or cognizant.

To be aware of; to be cognizant of.

To be acquainted (with another person).

To be acquainted or familiar with; to have encountered.

To have sexual relations with. This meaning normally specified in modern English as e.g. to ’know someone in the biblical sense’ or to ‘know biblically.’

To experience.

To understand or have a grasp of through experience or study.

To be able to distinguish, to discern, particularly by contrast or comparison; to recognize the nature of.

To recognize as the same (as someone or something previously encountered) after an absence or change.

To have knowledge; to have information, be informed.

To be able to play or perform (a song or other piece of music).

To have indexed and have information about within one's database.

To maintain subject to a given philosophical definition of knowledge; to hold a justified true belief.

Knowledge; the state of knowing.

Knowledge; the state of knowing. (Now confined to the fixed phrase in the know.)

Alternative form of knowe (hill, knoll)

Used at the end of a sentence to draw attention to information the speaker thinks the listener should keep in mind.

Used at the end a declarative sentence to emphasize it.

nuts

Alternative form of kne

Alternative form of knouth

Source: wiktionary.org