picket

Definition
(noun) a person employed to keep watch for some anticipated event Definition
(noun) a detachment of troops guarding an army from surprise attack Definition
(noun) a protester posted by a labor organization outside a place of work Definition
(noun) a vehicle performing sentinel duty Definition
(noun) a wooden strip forming part of a fence Definition
(noun) a form of military punishment used by the British in the late 17th century in which a soldier was forced to stand on one foot on a pointed stake Definition
(verb) serve as pickets or post pickets Definition
(verb) fasten with a picket