Noun
A soldier placed on guard; a sentinel.
Guard; watch, as by a sentinel.
Source: Webster's dictionaryThe landmine is eternally prepared to take victims. In common parlance, it is the perfect soldier, the 'eternal sentry.' The war ends, the landmine goes on killing. Jody Williams
My soul, there is a country Far beyond the stars Where stands a wingèd sentry All skillful in the wars: There, above noise and danger, Sweet Peace is crowned with smiles, And One born in a manger Commands the beauteous files. Henry Vaughan
The war was about to end and yet the Japanese were obsessed with knowing exactly how many prisoners they held. Jim closed his eyes to calm his mind, but the sentry barked at him, suspecting that Jim was about to play some private game of which Sergeant Nagata would disapprove. J. G. Ballard
Being raised Catholic in a pressure-cooker household besieged by alcohol and bill collectors enforced and heightened a sense of sentry duty in me, the oldest of five children and the one most responsible for keeping everything from capsizing. Wild indulgence was for other people, the non-worriers. James Wolcott
Landscape is more than flat land covered by floodwater, the seeping of peat bogs, a river of liquid pewter viewed from a sentry tower. It's an influence on what a person values, what she is willing to sacrifice or argue for. Susan Vreeland
AP officers arrived as the guards were taking him into their sentry post at the gate. Source: Internet