- Any thing or being regarded as having the power of
spontaneous motion or action. - A self-moving machine, or one which has its motive
power within itself; -- applied chiefly to machines which appear to
imitate spontaneously the motions of living beings, such as men, birds,
etc.
Meaning of 'automaton' (Princeton's WordNet)
1 . automaton
[ n]
Meaning (1): - someone who acts or responds in a mechanical or apathetic way