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We found 15 dictionaries with English definitions that include the word blue box:
Click on the first link on a line below to go directly to a page where "blue box" is defined.

General (9 matching dictionaries)

1. blue box, blue-box: Dictionary/thesaurus [home, info]
2. Blue box, Blue box (phreaking), Blue box (disambiguation), Blue Box (novel), Blue Box (container), Blue Box (album), Blue Box (Kate Ceberano album): Wikipedia, the Free Encyclopedia [home, info]
3. blue-box, Blue Box: Dictionary.com [home, info]
4. blue box: Infoplease Dictionary [home, info]
5. blue box: Wiktionary [home, info]
6. blue box: Collins English Dictionary [home, info]
7. blue box: American Heritage Dictionary of the English Language [home, info]
8. blue box: Oxford Dictionaries [home, info]
9. blue box: Merriam-Webster.com [home, info]

Business (1 matching dictionary)

10. Blue box: Deardorff's Glossary of International Economics [home, info]

Computing (2 matching dictionaries)

11. Blue box (phreaking), Blue Box: Encyclopedia [home, info]
12. Blue Box: Free On-line Dictionary of Computing [home, info]

Medicine (1 matching dictionary)

13. Blue Box: online medical dictionary [home, info]

Science (1 matching dictionary)

14. blue box: Agricultural Thesaurus and Glossary [home, info]

Slang (1 matching dictionary)

15. Blue Box: Urban Dictionary [home, info]

Quick definitions from Wiktionary (blue box) ▸ noun:  (chiefly Britain and Canada) A blue container used for the collection of household waste (such as tin cans and newspapers) for recycling by a municipal authority. ▸ noun:  An electronic device used to bypass payment on a tone pulse telephone system. ▸ Words similar to blue box ▸ Usage examples for blue box ▸ Words that often appear near blue box ▸ Rhymes of blue box ▸ Invented words related to blue box