1. The frequency of the waves transmitted by a specific radio station.
2. A frequency in the range within which radio waves may be transmitted, from about 3 kilohertz to about 300,000 megahertz.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.