Meaning 1:
Radio frequency.
Meaning 2:
Right Front.
Meaning 3:
Roof. An abbreviation.
Meaning 1:
Radio frequency (RF) is a frequency, or rate of oscillation, of electromagnetic radiation within the range of about 3 Hz to 300 GHz. This range corresponds to the frequency of alternating current electrical signals used to produce and detect radio waves. Since most of this range is beyond the vibration rate that most mechanical systems can respond to, RF usually refers to oscillations in electrical circuits.