Definitions
1.verbTo perceive the truth or factuality of; to be certain of or that."He knew something terrible was going to happen."
2.verbTo be aware of; to be cognizant of."Did you know Michelle and Jack were getting divorced? ― Yes, I knew."
3.verbTo be acquainted or familiar with; to have encountered."I know your mother, but I’ve never met your father."
4.verbTo experience."Their relationship knew ups and downs."
5.verbTo be able to distinguish, to discern, particularly by contrast or comparison; to recognize the nature of."I wouldn't know one from the other."
6.verbTo recognize as the same (as someone or something previously encountered) after an absence or change.
7.verbTo understand or have a grasp of through experience or study."His mother tongue is Italian, but he also knows French and English."
8.verbTo 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.’
9.verbTo have knowledge; to have information, be informed."He knows about 19th century politics."
10.verbTo be or become aware or cognizant."Did you know Michelle and Jack were getting divorced? ― Yes, I knew."
11.verbTo be acquainted (with another person).
12.verbTo be able to play or perform (a song or other piece of music)."Do you know "Blueberry Hill"?"
13.nounThe act or condition of having knowledge.
14.adjectivePossessing knowledge or understanding; intelligent.
15.adjectiveShrewd or showing clever awareness."a knowing rascal"
16.adjectiveSuggestive of private knowledge.
17.adjectiveDeliberate