a pirate flag, usually of black cloth with a white skull and crossbones on it; Jolly Roger.
a flag having two yellow and two black squares, signifying the letter L in the International Code of Signals: formerly so called when used by itself to indicate the presence of cholera on board a vessel.
a signal given to an automobile racing driver to stop, usually because the car may have a dangerous problem that requires inspection.
- Also called blackjack (for defs. 1, 2).
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use black flag in a sentence
He used some of the captives as human shields and forced others to hold a black flag with white Arabic writing against the window.
Now everyone says, “Oh, black flag and the Ramones were great, and slavery was terrible.”Julian Casablancas Enters the Void: On the Strokes’ Friction, Why He Left NYC, and Starting Over | Marlow Stern | October 9, 2014 | THE DAILY BEAST
Now al-Qaeda has come back in Iraq, raising its black flag over territory once fought over so hard by Americans.Al Qaeda’s Next Comeback Could Be Afghanistan And Pakistan | Bruce Riedel | January 13, 2014 | THE DAILY BEAST
In the beginning, they hung their black flag outside the clinic to show their power.
At Bracto, a Mexican commander with a superior force sent a black flag demanding his surrender.A History of the Nineteenth Century, Year by Year | Edwin Emerson
The black flag of the buccaneers of reconstruction marked not with death's heads but by red stars!The Broken Sword | Dennison Worthington
The black flag is up, and no doubt she means mischief; but all is fair and above board.Bentley's Miscellany, Volume II | Various
As to the black flag, that is merely a joke that my fellows play off upon people sometimes in order to frighten them.The Coral Island | R.M. Ballantyne
Cyrus Harding had not seen the suspected vessel hoist the black flag without deep anxiety.The Secret of the Island | W.H.G. Kingston (translation from Jules Verne)
British Dictionary definitions for black flag
another name for the Jolly Roger
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012