replacementsentry
nounUK /rɪˈpleɪsmənt ˈsɛntri/
US /rɪˈpleɪsmənt ˈsɛntri/
A replacement sentry is a guard who takes the place of another guard.
The replacement sentry arrived at midnight to take over the watch.
RELATED WORDS
OTHER MEANINGS
2. A soldier sent to fill a vacant guard post.
The sergeant assigned a replacement sentry to the eastern gate.
3. A temporary guard covering another's duty shift.
As a replacement sentry, she stood watch while the regular guard rested.
4. A backup guard kept ready in case the main sentry is unavailable.
The replacement sentry waited in the barracks until called.