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 Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for blue flag

Historical Examples of blue flag

  • Here are calamus patches, and alder thickets, and sedges without number; and the prickly carex and blue-flag abound on every side.

    Pastoral Days

    William Hamilton Gibson

British Dictionary definitions for blue flag

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