Drone

1)An aircraft that does not have a pilot but is controlled by someone on the ground, used especially for dropping bombs or for surveillance (= careful watching of a place).
2)An aircraft without a pilot that is controlled by someone on the ground, used especially as a hobby.

Sources:

Drone. (2024) Cambridge Dictionary. Retrieved from: https://dictionary.cambridge.org/dictionary/english/drone

Drone. (2024) Collins dictionary. Retrieved from: https://www.collinsdictionary.com/dictionary/english/drone