CQ

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.

Military. charge of quarters.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for cq

I'd like a gal from Oil Daily to ask energy questions, and a guy who covers health policy for CQ to ask health questions.
Commission on Debates: Do Something!|Michael Tomasky|October 12, 2012|DAILY BEAST
The CQ Politics report echoed and clarified a Time magazine story that circulated in October 2006.
Gonzales' New Coverup|Scott Horton|April 21, 2009|DAILY BEAST
The Harman matter emerged in an explosive piece published yesterday by CQ.
Gonzales' New Coverup|Scott Horton|April 21, 2009|DAILY BEAST
The form qq which would be phonetically equivalent to cq is not recorded.
Diego Collado's Grammar of the Japanese Language|Diego Collado

The last message sent out was "CQ" which was faintly heard by the steamer Virginian.
Loss of the Steamship 'Titanic'|British Government

British Dictionary definitions for cq

noun

telegraphy telephony a symbol transmitted by an amateur radio operator requesting two-way communication with any other amateur radio operator listening

abbreviation for

military charge of quarters

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