verb

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

   “He knew something terrible was going to happen.”

2. To be aware of; to be cognizant of.

   “Did you know Michelle and Jack were getting divorced? ― Yes, I knew.”

3. To be acquainted or familiar with; to have encountered.

   “I know your mother, but I’ve never met your father.”

Synonyms: coitize, go to bed with, sleep with

noun

1. The act or condition of having knowledge.

adjective

1. Possessing knowledge or understanding; intelligent.

2. Shrewd or showing clever awareness.

   “a knowing rascal”

3. Suggestive of private knowledge.