Dictionary.com
Thesaurus.com

blue flag

American  

noun

  1. any North American plant of the genus Iris, especially I. versicolor : the state flower of Tennessee.


Blue Flag British  

noun

  1. 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

Etymology

Origin of blue flag

An Americanism dating back to 1775–85

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They circled overhead towing banners that read: "Congratulations to the New Federal State of China" and flew an unfamiliar-looking blue flag.

From BBC • Mar. 24, 2023

At the protests, Millaray would rap or stroll among protesters with her hand-painted blue flag bearing the “Wünelfe,” an eight-point star sacred in Mapuche iconography.

From New York Times • Jan. 27, 2023

Secor entered the Capitol while carrying a blue flag with the white letters “AF” and wearing a hat bearing the same “AF” emblem.

From Seattle Times • Oct. 19, 2022

The acting president of Ukraine’s track and field federation logged into the Zoom meeting from his olive-green tent near the front lines, the country’s yellow and blue flag in the background.

From Los Angeles Times • Jul. 14, 2022

When a ship is ready to sail, it flies a blue flag with a white square that stands for the letter P—blue peter.

From "Silent To The Bone" by E.L. Konigsburg