Wiktionary
sentry-box
alt. A booth, erected to provide elementary shelter to a sentry on his post n. A booth, erected to provide elementary shelter to a sentry on his post
Usage examples of "sentry-box".
Man may, in effect, be said to look out on the world from a sentry-box with two joined sashes for his window.
The German soldiers by the innumerable sentry-boxes looked strangely like German toys, and the clean-cut battlements of the castle, gilded by the sunshine, looked the more like the gilt gingerbread.
He multiplied the ordinary daily and nightly guard round his castle till there seemed to be more sentry-boxes than houses in the town, and doubtful characters were shot without mercy.