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blue flag

any North American plant of the genus Iris, especially I. versicolor : the state flower of Tennessee.
Origin of blue flag
An Americanism dating back to 1775-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for blue flags
Historical Examples
  • So we made a set of blue flags, which gave us thirty more communications by using them in place of the white ones.

  • On one side there was a forest of blue flags waving up and down, sideways, around in circles.

    Andy at Yale Roy Eliot Stokes
  • blue flags waved graceful leaves, willows grew in clumps, and vines clambered everywhere.

    The Harvester Gene Stratton Porter
  • blue flags waved wildly then, while, across the dimming field, the Brimfield stand was silent and disappointed.

    Left Tackle Thayer Ralph Henry Barbour
  • Above the stand the backs of the spectators in the top row of seats looked strangely agitated, and blue flags waved and snapped.

    The Turner Twins Ralph Henry Barbour
  • Again the red and blue flags blossom at the New York's yard-arm like the magic flowers in the last scene of a fairy play.

  • The blue flags, signal for a charge, rose and waved over the Sons of the Falcon.

British Dictionary definitions for blue flags

Blue Flag

an award given to a seaside resort that meets EU standards of cleanliness of beaches and purity of water in bathing areas
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
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Slang definitions & phrases for blue flags

blue flags

noun phrase

lsd (1970s+ Narcotics)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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