radio frequency

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The frequency of the waves transmitted by a specific radio station.
• noun A frequency within the range at which radio waves are transmitted, conventionally from 3 hertz to 300 megahertz, immediately below the range of microwave frequencies in the electromagnetic spectrum.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun uncountable That part of the electromagnetic spectrum, between about 3 kHz and 300 MHz, within which radio waves are transmitted.
• noun countable A frequency in this range.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an electromagnetic wave frequency between audio and infrared