verb To perceive the truth or factuality of; to be certain of; to be certain that.
I know that I’m right and you’re wrong.
verb To be or become aware or cognizant.
Did you know Michelle and Jack were getting divorced? ― Yes, I knew.
verb To be aware of; to be cognizant of.
Did you know Michelle and Jack were getting divorced? ― Yes, I knew.
verb To be acquainted (with another person).
verb To be acquainted or familiar with; to have encountered.
I know your mother, but I've never met your father.
verb 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'.
verb To experience.
Their relationship knew ups and downs.
verb To understand or have a grasp of through experience or study.