We found 15 dictionaries that define the word reefs:

General (10 matching dictionaries)

1. reefs: Merriam-Webster
2. reefs: Collins English Dictionary
3. Reefs, reefs: Vocabulary.com
4. Reef's, Reefs, reef's, reefs: Wordnik
5. reefs: Cambridge Advanced Learner's Dictionary
6. reefs: Wiktionary
7. reefs: Dictionary.com
8. reefs: Cambridge Essential American English Dictionary
9. reefs: TheFreeDictionary.com
10. Reefs: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)

11. reefs: Encyclopedia

Medicine (1 matching dictionary)

12. reefs: Medical dictionary

Miscellaneous (1 matching dictionary)

13. REEFS: Acronym Finder

Science (1 matching dictionary)

14. Agricultural Thesaurus and Glossary (No longer online)

Slang (1 matching dictionary)

15. reefs: Urban Dictionary

(Note: See reef as well.)

Definitions from Wikipedia (Reefs) ▸ noun:  a novel by Kevin O'Donnell Jr. published in 1981. Types: atolls, fringing reefs, barrier reefs, guyots, seamounts, mounds, pinnacles, banks, more... Phrases: coral reefs, fringing reefs, barrier reefs, patch reefs, saddle reefs, more... Adjectives: coral, artificial, shallow, rocky, dangerous, outer, tropical, barrier, extensive, modern, numerous ▸ Words similar to reefs ▸ Usage examples for reefs ▸ Idioms related to reefs ▸ Wikipedia articles (New!) ▸ Popular adjectives describing reefs ▸ Words that often appear near reefs ▸ Rhymes of reefs ▸ Invented words related to reefs