Thayer's Greek Lexicon

 1. an experiment, attempt, trial, proving
  1) trial, proving: the trial made of you by my bodily
condition, since condition served as to test the love of the
Galatians toward Paul (Gal. 4:14.
  2) the trial of man's fidelity, integrity, virtue, constancy
1b1. an enticement to sin, temptation, whether arising from
the desires or from the outward circumstances
1b2. an internal temptation to sin
1b  1) of the temptation by which the devil sought to divert
Jesus the Messiah from his divine errand
1b3. of the condition of things, or a mental state, by which we
are enticed to sin, or to a lapse from the faith and
holiness
1b4. adversity, affliction, trouble: sent by God and serving to
test or prove one's character, faith, holiness
  3) temptation (i.e. trial) of God by men
1c1. rebellion against God, by which his power and justice
are, as it were, put to the proof and challenged to show
themselves