
1) Crewless 2) Lacking a crew 3) Like many a space probe 4) Like peopleless spacecraft 5) Pilotless 6) Remote-controlled 7) Unmade
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https://www.crosswordclues.com/clue/unmanned

1) Pilotless
Found on
https://www.crosswordclues.com/clue/unmanned

Unmanned describes machines without a person (`man`) on board. `Unmanned` usually refers to unmanned vehicles (remote controlled, remote guided or autonomous) such as: It can also refer to: See also: ...
Found on
http://en.wikipedia.org/wiki/Unmanned

• (a.) Not tamed; not made familiar with, or subject to, man; -- also used figuratively. • (a.) Not furnished with men; as, an unmanned ship. • (a.) Deprived of manly qualities; deficient in vigor, strength, courage, etc.; weak; effeminate.
Found on
http://thinkexist.com/dictionary/meaning/unmanned/

1. Deprived of manly qualities; deficient in vigor, strength, courage, etc.; weak; effeminate. ... 2. <veterinary> Not tamed; not made familiar with, or subject to, man; also used figuratively. 'Hood my unmanned blood bating in my cheeks With thy black mantle.' (Shak) ... 3. Not furnished with men; as, an unmanned ship. ... Source: Websters D...
Found on
http://www.encyclo.co.uk/local/20973

[
adj] - lacking a crew
Found on
http://www.webdictionary.co.uk/definition.php?query=unmanned

does not require the aid of a human inside the device to make it work — controlled by radio or other methods
Found on
https://sciencetrek.org/sciencetrek/topics/astronauts/glossary.cfm
remote-controlled adjective lacking a crew; `an unmanned satellite to Mars`
Found on
https://www.encyclo.co.uk/local/20974

without the physical presence of people in control: an unmanned spacecraft. · (of a captured hawk) untrained for hunting with a master; unmade.
Found on
https://www.infoplease.com/dictionary/unmanned
No exact match found.