0 a worker or group of workers who protest outside a building to prevent other workers from going inside, especially because they have a disagreement with their employers: --
2 a person or group of people who have a disagreement with a company, usually the one where they work, and who walk around in a line outside the place of business to tell other people not to enter until the problem is solved: --
3 a group of people who stand outside an organization's building holding signs to protest against something. The people who protest are often employees who disagree with the management: --
Workers picked up their picket signs and began their protest.
stand on/walk the picket line We spent two weeks walking the picket line, trying to get better benefits.
The new government was determined to avoid a return to the old days of industrial action and mass picket lines.
The rail union is planning a 150-person picket of the terminal for two days next week.
4 a single person in a picket line: --
Police escorts were provided for tanker drivers who had experienced intimidation by pickets.
5 to show an organization that you are not satisfied with them by standing outside their building and trying to prevent people from entering and doing business with them : --
In this case, 40 pickets outside the main entrance to a factory moved about in a continuous circle, thus obstructing vehicles and pedestrians.
At least those pickets hold no public office and have no public responsibility.
Even now the factory is being picketed and children are being kept away from school.
They have also had to patrol roads picketed by strikers in times of civil disturbance.
The ordinary hours of the civil guard, which have not been changed, are much shorter than those of the pickets.
We shall drift back to the bad old days of 1979, with secondary picketing and flying pickets.
He was charged with bias, his office was picketed and suggestions were made that his investigation was motivated by personal gain.
The booklet sets out perfectly good, standard guidelines as to what ought to be the behaviour of mass pickets.