Definition of "unstaffed"

India’s national space agency said that communications with its first unstaffed spacecraft to orbit the moon were lost on Saturday and that its scientists were no longer controlling the orbiter.

2009 August 30, The Associated Press, “Indian Moon Orbiter Loses Contact”, in New York Times‎

The RMT says that some unstaffed stations cater for hundreds of thousands of passengers each year, citing as examples Barry Island (867,598 passengers in 2018-19), Dumbarton East (453,010) and East Worthing (424,176).

2020 January 29, “Network News: Motion in support of station staff”, in Rail, page 25