reserveduty
nounUK /rɪˈzɜːv ˈdjuːti/
US /rɪˈzɜːrv ˈduːti/
A special job someone is kept ready to do when needed.
The firefighter was on reserveduty in case a fire started.
OTHER MEANINGS
2. A soldier kept ready to fight if needed.
The reserveduty soldiers waited at the base.
3. A turn to stay ready to help at any time.
She had reserveduty at the hospital all night.
4. A job of watching over something until it is needed.
His reserveduty was to guard the extra supplies.