Deverbal fromback up.

back-up (notcomparable)

1. Alternative form ofbackup

back-up (pluralback-ups)

1. Alternative form ofbackup
   • 2022 June 29, “Network News: Emergency timetables: just 20% of services set to run”, inRAIL, number960, page 6:

     Despite deploying a contingency workforce of fully trained non-striking and non-unionback-up staff, Network Rail was forced to issue a limited timetable with only 20% of services running on June 21, 23 and 25.

• upback