Meaning of AUTOMATON in English

AUTOMATON

[noun] [C] [plural] automatons or automata - a machine which operates on its own without the need for human control, or a person who acts like a machine without considering what they are doing, esp. because they are bored or tiredHalfway through the exam, I turned into an automaton and was writing without thinking.

Cambridge English vocab.      Кембриджский английский словарь.