n. (pl. -ies) a soldier etc. stationed to keep guard. sentry-box a wooden cabin intended to shelter a standing sentry. sentry-go the duty of pacing up and down as a sentry.
[ perh. f. obs. centrinel, var. of SENTINEL ]
SENTRY
Meaning of SENTRY in English
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012