Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.
a radio-frequency band or radio frequency lying between 3 and 30 megahertz
high frequency[′hī ¦frē·kwən·sē]
Federal Communications Commission designation for the band from 3 to 30 megahertz in the radio spectrum. Abbreviated HF.
The frequency band between 3 and 30 MHz. This normally is used for long-range air-to-ground communications.