Definition of "radio" []

• The wireless transmission through space of electromagnetic waves in the approximate frequency range from 10 kilohertz to 300,000 megahertz. (noun)
• Communication of audible signals encoded in electromagnetic waves. (noun)
• Transmission of programs for the public by radio broadcast. (noun)
• An apparatus used to transmit radio signals; a transmitter. (noun)
• An apparatus used to receive radio signals; a receiver. (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.

• "While the White House can count on the Right’s vertically integrated media machine – from cable TV to talk radio, from newspapers and magazines to book publishing and the Internet – the opposition has mostly scattered voices on the Internet and in fledgling “progressive talk radio” to make its case."
• "Why lah they must use the radio channel to boast which club they went to last night, how they dance lah, yadda yadda yadda bla bla bla. * turn off radio*"
• "A: The only thing a contract's worth in radio is how much they're going to pay you when they fire you."