0 a worker who travels to support workers who are on strike at another place of work
1 a worker who travels to support workers who are on strike (= refusing to work) at another place of work:
Flying pickets, secondary pickets, whatever you call them, are inherently intended to frighten.
Flying pickets are, thankfully, a thing of the past.
Flying pickets roamed the country, patients were denied supplies in hospitals at certain places, and in others the dead were not buried.
Those were the actions of a flying picket—an attempt to block our legitimate procedure.
Furthermore, it is to be a flying picket.
The concept of the rotating and flying picket was foreign in the industrial atmosphere previous to 1906.
While providing safeguards in respect of trade union officials, the provision will give employers afflicted by the "flying picket" the ability to seek an injunction to stop such picketing.
He accused them of organising violence by flying pickets, whom he described as thugs.