We found 16 dictionaries that define the word drainage area:

General (10 matching dictionaries)

1. drainage area: Collins English Dictionary
2. drainage area: Vocabulary.com
3. drainage-area: Wordnik
4. drainage area: Dictionary.com
5. Drainage area: Wikipedia, the Free Encyclopedia
6. drainage area: Rhymezone
7. drainage area: FreeDictionary.org
8. drainage area: Mnemonic Dictionary
9. drainage area: TheFreeDictionary.com
10. drainage area: Wiktionary

Computing (1 matching dictionary)

11. drainage area: Encyclopedia

Tech (5 matching dictionaries)

12. Glossary of Meteorology (No longer online)
13. Lake and Water Word Glossary (No longer online)
14. National Weather Service Glossary (No longer online)
15. Schlumberger Oilfield Glossary (No longer online)
16. Drainage area: Science In Your Watershed: Hydrologic Definitions

(Note: See drainage_areas as well.)

Definitions from Wiktionary (drainage area) ▸ noun:  Synonym of watershed ▸ Words similar to drainage area ▸ Usage examples for drainage area ▸ Idioms related to drainage area ▸ Wikipedia articles (New!) ▸ Words that often appear near drainage area ▸ Rhymes of drainage area ▸ Invented words related to drainage area