Thayer's Greek Lexicon

 1. an image, figure, likeness
  1) an image of the things (the heavenly things)
1a1. used of the moral likeness of renewed men to God
1a2. the image of the Son of God, into which true Christians
are transformed, is likeness not only to the heavenly body,
but also to the most holy and blessed state of mind,
which Christ possesses
  2) the image of one
1b1. one in whom the likeness of any one is seen
1b2. applied to man on account of his power of command
1b3. to Christ on account of his divine nature and absolute
moral excellence