1. （因为疲惫、厌烦等）动作机械的人
If you say that someone is an automaton, you are critical of them because they behave as if they are so tired or bored that they do things without thinking.

2. 小机器人
An automaton is a small, mechanical figure that can move automatically.

1. a mechanism that can move automatically

Synonym: robotgolem

2. someone who acts or responds in a mechanical or apathetic way

e.g. only an automaton wouldn't have noticed

Synonym: zombizombie