We found 21 dictionaries that define the word customs union:

General (15 matching dictionaries)

1. customs union: Merriam-Webster
2. customs union: Oxford Learner's Dictionaries
3. customs union: American Heritage Dictionary of the English Language
4. customs union: Collins English Dictionary
5. customs union: Vocabulary.com
6. customs-union: Wordnik
7. customs union: Wiktionary
8. customs union: Infoplease Dictionary
9. customs union: Dictionary.com
10. Customs Union, Customs union: Wikipedia, the Free Encyclopedia
11. customs union: Rhymezone
12. customs union: FreeDictionary.org
13. customs union: Mnemonic Dictionary
14. customs union: TheFreeDictionary.com
15. customs union: Longman Dictionary of Contemporary English

Business (4 matching dictionaries)

16. MoneyGlossary.com (No longer online)
17. Customs union: Financial dictionary
18. Glossary of Trade and Shipping Terms (No longer online)
19. BusinessDictionary.com (No longer online)

Computing (1 matching dictionary)

20. customs union: Encyclopedia

Tech (1 matching dictionary)

21. Glossary of Agricultural Terms, Programs and Laws (No longer online)

(Note: See customs_unions as well.)

Definitions from Wiktionary (customs union) ▸ noun:  A type of trade bloc which is composed of a free trade area with a common external tariff. Similar: trade bloc, trade union, single market, labor union, cumulation, customs duty, trade war, tariff barrier, trade agreement, trade deal, more... Opposite: free trade area, common market, economic union Phrases: Southern African Customs Union, European Union Customs Union, Eurasian Customs Union, Directorate-General for Taxation and Customs Union, arab customs union, more... ▸ Words similar to customs union ▸ Usage examples for customs union ▸ Idioms related to customs union ▸ Wikipedia articles (New!) ▸ Words that often appear near customs union ▸ Rhymes of customs union ▸ Invented words related to customs union