Thayer's Greek Lexicon

 1. to gain, acquire, to get gain
2. metaph.
  1) of gain arising from shunning or escaping from evil (where we
say "to spare one's self", "be spared")
  2) to gain any one i.e. to win him over to the kingdom of God, to
gain one to faith in Christ
  3) to gain Christ's favour and fellowship