Soldiers or troops placed on a line forward of a position to warn against an enemy advance. It can also refer to any unit (for example, an aircraft or ship) performing a similar function
Pickets are people who are picketing a place of work. The strikers agreed to remove their pickets and hold talks with the government
When a group of people, usually trade union members, picket a place of work, they stand outside it in order to protest about something, to prevent people from going in, or to persuade the workers to join a strike. The miners went on strike and picketed the power stations 100 union members and supporters picketed outside. Picket is also a noun. forty demonstrators who have set up a twenty four hour picket. + picketing pick·et·ing There was widespread picketing of mines where work was continuing
By extension, men appointed by a trades union, or other labor organization, to intercept outsiders, and prevent them from working for employers with whom the organization is at variance
a wooden strip forming part of a fence a vehicle performing sentinel duty a detachment of troops guarding an army from surprise attack a protester posted by a labor organization outside a place of work fasten with a picket; "picket the goat"