CQ

CQ

1.
Radio. a signal sent at the beginning of radiograms conveying general information or sent by an amateur as an invitation for any other amateur to reply.
2.
Military. charge of quarters.
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World English Dictionary
CQ
 
n
1.  telegraphy, telephony a symbol transmitted by an amateur radio operator requesting two-way communication with any other amateur radio operator listening
 
abbreviation for
2.  military charge of quarters

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Abbreviations & Acronyms
CQ
call to quarters
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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