picket

noun

• 1a person or group of people standing outside a place of work or other venue, protesting something or trying to persuade others not to enter during a strike.
• a blockade of a workplace or other venue staged by a group of people in protest of something.

• 2a soldier or party of soldiers performing a particular duty:a picket of soldiers fired a volley over the coffin

• 3 [usually as modifier] a pointed wooden stake driven into the ground, typically to form a fence or palisade or to tether a horse:a cedar-picket stockadeSee also picket fence.

verb (pickets, picketing, picketed)

• 1act as a picket outside (a place of work or other venue):strikers picketed the newspaper’s main building [no object]:18,000 people turned up to picket