Thayer's Greek Lexicon

 1. to see
  1) to perceive with the eyes
  2) to perceive by any of the senses
  3) to perceive, notice, discern, discover
  4) to see
1d1. i.e. to turn the eyes, the mind, the attention to anything
1d2. to pay attention, observe
1d3. to see about something
1d31. i.e. to ascertain what must be done about it
1d4. to inspect, examine
1d5. to look at, behold
  5) to experience any state or condition
  6) to see i.e. have an interview with, to visit
2. to know
  1) to know of anything
  2) to know, i.e. get knowledge of, understand, perceive
2b1. of any fact
2b2. the force and meaning of something which has definite meaning
2b3. to know how, to be skilled in
  3) to have regard for one, cherish, pay attention to (1Th. 5:12.

For Synonyms see entry G5825