picket -- (a detachment of troops guarding an army from surprise attack)
picket -- (a protester posted by a labor organization outside a place of work)
picket -- (a vehicle performing sentinel duty)
picket, pale -- (a wooden strip forming part of a fence)
picket, piquet -- (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)
Overview of verb picket
The verb picket has 2 senses
picket -- (serve as pickets or post pickets; "picket a business to protest the layoffs")
picket -- (fasten with a picket; "picket the goat")