Pa-trōl'1, n.
n. [Fr. patrouille, O. Fr. patouille, Sp. patrulla, Pg. patrulha, It. pattuglia. See infra.]
Sense 1. (Mil.) A walking or marching round of a guard in the night, to watch and observe what passes, and to secure the peace and safety of a camp or other place.
Sense 2. The guard or persons who go the rounds for observation; a detachment whose duty it is to patrol.
In France there is an army of patrols to secure her fiscal regulations. Hamilton.