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blue box

noun
1.
an electronic device used by phone phreaks to send out signals that unlock long-distance telephone circuits.
Origin of blue box
1975-1980
1975-80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for blue box
British Dictionary definitions for blue box

blue box

noun
1.
(Canadian) a blue plastic container for domestic refuse that is to be collected and recycled
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Slang definitions & phrases for blue box

blue box

noun phrase

An electronic device enabling one to make long-distance telephone calls without paying: the alleged use of an electronic ''blue box'' to avoid telephone tolls (1970s+ College students)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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blue box in Technology

operating system
The complete implementation of the Mac OS run-time environment on the more modern Rhapsody operating system. Blue Box is not an emulation layer; at any given time it will be based on the same source code and ROM image as the current version of Mac OS and will thus incorporate future Mac OS improvements.
(1997-10-15)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Difficulty index for blue box

Few English speakers likely know this word

Word Value for blue

6
9
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