We found 26 dictionaries that define the word blue flag:

General (16 matching dictionaries)

1. blue flag: Merriam-Webster
2. blue flag: Oxford Learner's Dictionaries
3. blue flag: American Heritage Dictionary of the English Language
4. Blue Flag: Collins English Dictionary
5. blue flag: Vocabulary.com
6. blue flag: Wiktionary
7. blue flag: The Wordsmyth English Dictionary-Thesaurus
8. blue flag: Infoplease Dictionary
9. blue flag: Dictionary.com
10. Blue Flag (Israeli Air Force exercise), Blue Flag (disambiguation), Blue Flag, Blue flag (disambiguation), Blue flag, The Blue Flag: Wikipedia, the Free Encyclopedia
11. blue flag: Rhymezone
12. Blue Flag: E Cobham Brewer, The Reader's Handbook
13. Blue Flag: Dictionary of Phrase and Fable (1898)
14. blue flag: FreeDictionary.org
15. blue flag: Mnemonic Dictionary
16. blue flag: TheFreeDictionary.com

Art (1 matching dictionary)

17. Blue Flag: Health & Beauty Glossary

Medicine (3 matching dictionaries)

18. blue flag: Merriam-Webster Medical Dictionary
19. Hepatitis C Information Central (No longer online)
20. blue flag: Medical dictionary

Science (2 matching dictionaries)

21. Blue Flag: Botanical Name listing of Plants
22. A Modern Herbal, 1931, by Mrs. M. Grieve (No longer online)

Slang (1 matching dictionary)

23. blue flag: Urban Dictionary

Sports (1 matching dictionary)

24. Blue flag: Sports Definitions

Tech (2 matching dictionaries)

25. AUTOMOTIVE TERMS (No longer online)
26. Blue Flag: Beauty & Health Glossary

(Note: See blue_flags as well.)

Definitions from Wiktionary (blue flag) ▸ noun:  An award given to European beaches, based on cleanliness and water quality. Similar: Iris versicolor, Blue Ensign, blue gold, seabeach, blue angel, strand, aquamarine, seasand, storm beach, European sea bass, more... Types: navy blue, royal blue, azure blue, turquoise blue, indigo blue, powder blue, baby blue, periwinkle blue, more... Phrases: southern blue flag, Bonnie Blue flag, The Bonnie Blue Flag, Blue Flag beach, when i die bury me with my blue flag, more... Adjectives: shantylike, cottagey, shanty, bowery, virgate, garden, isled, tabernacular, hutted, pavilioned, tanklike ▸ Words similar to blue flag ▸ Usage examples for blue flag ▸ Idioms related to blue flag ▸ Wikipedia articles (New!) ▸ Words that often appear near blue flag ▸ Rhymes of blue flag ▸ Invented words related to blue flag