CQ

CQ 1

 (sē′kyo͞o′)
n.
Code letters used at the beginning of radio messages intended for all receivers.
[Origin unknown.]

CQ 2

abbr.
call to quarters
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.

CQ

n
(Telecommunications) telegraphy telephony a symbol transmitted by an amateur radio operator requesting two-way communication with any other amateur radio operator listening
abbreviation for
(Military) military charge of quarters
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

CQ

charge of quarters.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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