A message transmitted by wireless telegraphy.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "radiogram" in a sentence
"The formal definition of a radiogram is a plain text message sent in a recognizable format over amateur radio, but in this case it describes a coded message transmitted over shortwave radio directly to operatives in Moscow."
"That message was to be sent by "radiogram," a wireless communication method similar to Morse code, the document said."
"It went straight on to the radiogram, and I played it over and over again."