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.
n. Anything for defense placed at a distance from the thing to be defended.
the GNU version of the Collaborative International Dictionary of English
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.
The Century Dictionary and Cyclopedia
n. A guard at a distance from the main body of an army; the guard at the furthest distance; hence, anything for defense placed at a distance from the thing to be defended.
Word Usage
"At midnight the fair was still packed and the outguard patrols of the PFs and Marines had reported all was quiet."