blue box(redirected from blue-box)
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An electronic device equipped with a tone pulsator that was formerly used to place free, illicit long-distance telephone calls by mimicking the tones sounded when operators routed such calls.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Canadian a blue plastic container for domestic refuse that is to be collected and recycled
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014