crewless

Without a crew; unmanned

Adjective

  1. Without a crew; unmanned
    • The short but extremely busy subway shuttle service on the northerly track between New York's Times Square and Grand Central Station will soon be provided by crewless three car trains. - 1961 February, “Talking of...
    • A device for the automatic control of crewless helper locomotives cut into the make-up of heavy freight trains has been perfected by the Louisville & Nashville RR in conjunction with the General Railway Signalling Co. -...
    • No hands on deck: Dawn of the crewless ship - 2013 December 26, Dave Rudd, “No hands on deck: Dawn of the crewless ship”, in The Financial Times:

Origin

From crew + -less.

Synonyms

uncrewed

Derived

crewlessness