|Noah Webster's Dictionary|
1. (n.) A soldier placed on guard; a sentinel.
2. (n.) Guard; watch, as by a sentinel.
Sentry (1 Occurrence)
Jeremiah 37:13 When he was in the gate of Benjamin, a captain of the guard was there, whose name was Irijah, the son of Shelemiah, the son of Hananiah; and he laid hold on Jeremiah the prophet, saying, You are falling away to the Chaldeans. (See RSV)