Thayer's Greek Lexicon

 1. to learn to know, come to know, get a knowledge of perceive, feel
  1) to become known
2. to know, understand, perceive, have knowledge of
  1) to understand
  2) to know
3. Jewish idiom for sexual intercourse between a man and a woman
4. to become acquainted with, to know

For Synonyms see entry G5825