un ‧ manned /ˌʌnˈmænd◂/ BrE AmE adjective
[ Word Family: noun : ↑ man , ↑ manhood , ↑ mankind ; adjective : ↑ manly ≠ ↑ unmanly , manned ≠ ↑ unmanned , ↑ mannish ; verb : ↑ man ; adverb : ↑ manfully ]
1 . an unmanned spacecraft does not have a person inside it
2 . if a place is unmanned, nobody is working there:
an unmanned railway crossing