1. • noun - a person employed to keep watch for some anticipated event
   • noun - a detachment of troops guarding an army from surprise attack
   • noun - a protester posted by a labor organization outside a place of work
   • noun - a vehicle performing sentinel duty
   • noun - a wooden strip forming part of a fence
   • 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
   • verb - serve as pickets or post pickets
   • verb - fasten with a picket
2. • A pointed stake often driven into the ground to support a fence, secure a tent, tether animals, mark points in surveying, or, when pointed at the top, serve as a defense.
   • A detachment of one or more troops, ships, or aircraft held in readiness or advanced to warn of an enemy’s approach: “The outlying sonar picket.... was to detect, localize, and engage any submarine trying to close the convoy” (Tom Clancy).
   • A person or group of persons stationed outside a place of employment, usually during a strike, to express grievance or protest and discourage entry by nonstriking employees or customers.
   • A person or group of persons present outside a building to protest.
   • To enclose, secure, tether, mark out, or fortify with pickets.
   • To post as a picket.
   • To guard with a picket.
   • To act or serve as a picket.
3. • v - to stand outside of some location, as a business, to publicize one's grievances against it

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