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Employees of the BBC form a picket line (def. 4) during a strike in May 2005.


picket line (plural picket lines)

  1. (rare) A line or rope held by one or many pickets, chiefly one used for tethering horses.
  2. (military, rare) A barrier or fortification formed by pickets; a stockade.
  3. A boundary guarded by a picket, or unit, of soldiers.
  4. The boundary created by striking workers, generally at the workplace entrance, which other workers are asked not to pass.