CQ
1CQ
\ˈsē-ˈkyü\Definition of CQ
—communications code letters used at the beginning of messages of general information or safety notices or by shortwave amateurs as an invitation to talk to other shortwave amateurs
Origin of CQ
call to quarters
First Known Use: 1924
Seen & Heard 
What made you want to look up CQ? Please tell us where you read or heard it (including the quote, if possible).
