A line or procession of people picketing a place of business or otherwise staging a public protest.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "picket line" in a sentence
"The aide Johnston designated for the mission did not return—he unwittingly rode into the Federal picket line and had to surrender—but Beckham, sometime after 10 o'clock, reported back that he had found Longstreet—on the Williamsburg Road opposite the point where the Charles City Road forked."
"It was a deposition detailing picket line scuttlebutt: members of the United Alliance of Extras and Stagehands mouthing Pinko platitudes overheard by counter-pickets from the Teamsters."
"Our friends on the Teamsters have heard picket line talk — that the UAES is planning strategy meetings aimed at coercing exorbitant contract demands out of the studios."