What is the meaning of Understand?

To know the meaning of; to parse or have parsed correctly; to comprehend.

To know the meaning of.

To be thoroughly familiar with; to be able to undertake properly.

To comprehend a fact or principle; to regard or come to regard a belief as such.

To know the intent, motives or character of; to know the causes of or reasons for.

To believe or infer, to think one grasps sufficiently despite potentially incomplete knowledge.

To regard as present when not.

To stand underneath, to support.

Uh-huh, I see; a way to acknowledge something said by the other speaker.

Source: wiktionary.org