Also found in: Acronyms, Encyclopedia, Wikipedia.
See call letters.
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.
(Broadcasting) a group of letters and numbers identifying a radio transmitting station, esp an amateur radio station. Compare call letters
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
letters of the alphabet or letters and numbers used esp. for identifying a radio or television station.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Any combination of characters or pronounceable words, which identifies a communication facility, a command, an authority, an activity, or a unit; used primarily for establishing and maintaining communications. Also called CS. See also collective call sign; indefinite call sign; international call sign; net call sign; tactical call sign; visual call sign; voice call sign.
Dictionary of Military and Associated Terms. US Department of Defense 2005.