1. 
   high frequency
   [n] - 3 to 30 megahertz
   Found op http://www.webdictionary.co.uk/definition.php?query=high%20frequency
   
   
2. 
   high frequency
   noun 3 to 30 megahertz
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=high%20frequency
   
   
3. 
   High frequency
   High frequency (HF) radio frequencies are between 3 and 30 MHz. Also known as the decameter band or decameter wave as the wavelengths range from one to ten decameters (ten to one hundred metres). Frequencies immediately below HF are denoted Medium-frequency (MF), and the next higher frequencies are...
   Found op http://en.wikipedia.org/wiki/High_frequency
   
   
4. 
   high frequency
   frequency greater than 10 kHz but less than or equal to 300 MHz
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=841-21-32
   
   
5. 
   high frequency
   frequency range, higher than one hundred kilohertz, for currents used essentially for their thermal effects
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=891-01-38
   
   

Tip: double click on a word to show its meaning.