Wiktionary
n. 1 (context uncountable English) That part of the electromagnetic spectrum, between about 3 kHz and 300 MHz, within which radio waves are transmitted. 2 (context countable English) A frequency in this range.
WordNet
n. an electromagnetic wave frequency between audio and infrared
Wikipedia
Radio frequency (RF) is any of the electromagnetic wave frequencies that lie in the range extending from around to , which include those frequencies used for communications or radar signals. RF usually refers to electrical rather than mechanical oscillations. However, mechanical RF systems do exist (see mechanical filter and RF MEMS).
Although radio frequency is a rate of oscillation, the term "radio frequency" or its abbreviation "RF" are used as a synonym for radio – i.e., to describe the use of wireless communication, as opposed to communication via electric wires. Examples include:
- Radio-frequency identification
- ISO/IEC 14443-2 Radio frequency power and signal interface
Usage examples of "radio frequency".
Perform a variety of duties associated with radio frequency engineering and management, radio-wave propagation, and electromagnetic compatibility.
Hold the paralyzing radio frequency charge on too long, and it might kill him.
You and they certainly both know what the most abundant kind of atom in the universe is, and the single radio frequency at which it characteristically absorbs and emits.
Thus the maser could be turned so that it was particularly sensitive to a selected radio frequency.
You point it toward some fairly broad region of the sky, and it records how much energy, in a particular radio frequency, is coming down to Earth.
She rubbed her head with a towel to dry her hair some more rather than use a hair dryer as the motor created radio frequency interference.
The necessary tuning adjustments made, Tommy Rockford pressed the transmit switch with his thumb, then released it, sending a laser-straight impulse of radio frequency toward the repeater.
There was also one Heavy Rescue ESU truck, two ambulances, and six Port Authority police cars, plus the Mobile Command Post, which had every radio frequency of every affiliated agency in New York as well as a complete phone center.
It is a form with various boxes at the top in which someone has written in a date (today's) and time (a couple of hours ago) and a few other data such as a radio frequency.