( n. )
A guard or small body of troops at a distance from the main body of an army, to watch for the approach of an enemy; hence, anything for defense placed at a distance from the thing to be defended.
( n. )
A guard or small body of troops at a distance from the main body of an army, to watch for the approach of an enemy; hence, anything for defense placed at a distance from the thing to be defended.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012