noun
1. 3 to 30 megahertz (Freq. 1)
• Syn: ↑HF
• Hypernyms: ↑radio frequency
• Part Holonyms: ↑electromagnetic spectrum
2. a pitch that is perceived as above other pitches (Freq. 1)
• Syn: ↑high pitch
• Ant: ↑low pitch (for: ↑high pitch)
• Hypernyms: ↑pitch
Useful english dictionary. 2012.