1 a group of people holding signs to show that they are not working and are having a disagreement with their employer:
2 → picket noun
Most people would be glad to condemn intimidation, mass picketing and violence on the picket line.
Violence on the picket line will do no service to the trade union movement and no service to industrial relations.
It is one occasion in relation to a picket line when the press cannot sneer at the trade unions.
One can feel the heat of the anger of people on the picket line.
They love to be asked what they have to say about violence on the picket line.
The third proposal concerns no right of discipline on crossing a picket line.
Is he further aware that diagnosis of emergency cases by the picket line is farcical and unacceptable to ill people?
Obviously, the rest of the container base men would not cross a picket line.