high frequency high-foreheaded • high-frequency · · · Info · Definitions · Synonyms · Characters · · high frequency · · Text Common · · Latin · · Scripts 14 · · Length 5 · · Syllables Definitions · · · (noun) 3 to 30 megahertz. Synonyms: high frequency, HF. · · Noun Definition 1 (noun) a pitch that is perceived as above other pitches. Synonyms: high pitch, high frequency. · · Noun Definition 2 Synonyms · · · hf · · Synonym 1 high pitch · · Synonym 2 Characters · · space U+0020 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E q latin small letter q U+0071 r latin small letter r U+0072 u latin small letter u U+0075 y latin small letter y U+0079