Thayer's Greek Lexicon

 1. the mind, comprising alike the faculties of perceiving and
understanding and those of feeling, judging, determining
  1) the intellectual faculty, the understanding
  2) reason in the narrower sense, as the capacity for
spiritual truth, the higher powers of the soul, the faculty
of perceiving divine things, of recognising goodness and of
hating evil
  3) the power of considering and judging soberly, calmly and
impartially
2. a particular mode of thinking and judging, i.e. thoughts,
feelings, purposes, desires