unmanned
unmanned — adjective
1. A machine, vehicle, or facility that is unmanned operates without any human bein
A machine, vehicle, or facility that is unmanned operates without any human beings present to guide or supervise it.
An unmanned drone flew over the forest to show firefighters the size of the fire.
unmanned drone — common collocation
The team left an unmanned weather station on the island to record data for a year.
Yuna's father operates unmanned machines at a factory that runs all day and night.
Last year, the space agency sent an unmanned rocket to study the surface of Mars.
Many supermarkets now have unmanned checkout counters where customers scan items themselves.
- uncrewed
preferred in aviation and space as a gender-neutral alternative; now standard in official usage
- automated
emphasises self-operation rather than absence of people; an automated system may still have human oversight nearby
- remote-controlled
implies that a human operator controls the device from a distance, unlike a fully autonomous unmanned system
- manned
direct opposite; having a human crew or operator on board
用法筆記
Frequently used before nouns describing vehicles (drone, rocket, ship), equipment (camera, weather station), and facilities (store, checkout counter). Increasingly replaced by uncrewed in aviation and space contexts.