What is the meaning of Centaur?

A mythical beast having a horse's body with a man's head and torso in place of the head and neck of the horse.

An icy planetoid that orbits the Sun between Jupiter and Neptune.

A chess-playing team comprising a human player and a computer who work together.

A human and an AI who work together.

centaur

centaur (mythical half-man, half-horse)

centaur

Source: wiktionary.org