Picket  —n. 1 one or more persons stationed outside a place of work to persuade others not to enter during a strike etc. 2 pointed stake driven into the ground. 3  a small body of troops sent out to watch for the enemy. B group of sentries. —v. (-t-) 1 a station or act as a picket. B beset or guard with a picket or pickets. 2 secure (a place) with stakes. 3 tether (an animal).