an award given to a seaside resort that meets EU standards of cleanliness of beaches and purity of water in bathing areas
Collins Concise English Dictionary © HarperCollins Publishers::
blue′ flag′,
- Plant Biologyany North American plant of the genus Iris, esp. I. versicolor: the state flower of Tennessee.
- 1775–85, American.
'Blue Flag' also found in these entries (note: many are not synonyms or translations):