To go the rounds along a chain of sentinels; to traverse
a police district or beat.

t To go the rounds of, as a sentry, guard, or policeman;
as, to patrol a frontier; to patrol a beat.

A going of the rounds along the chain of sentinels and
between the posts, by a guard, usually consisting of three or four men,
to insure greater security from attacks on the outposts.

The guard or men who go the rounds for observation; a
detachment whose duty it is to patrol.

Any perambulation of a particular line or district to
guard it; also, the men thus guarding; as, a customs patrol; a fire
patrol.