Table of Definitions of Kilohertz, Megahertz, Gigahertz, Terahertz Frequency DefinitionsFrequency in wordsDefinition of Megahertz MHzOne megahertz – one million cycles per second = 1,000,000Definition of Gigahertz GHzOne gigahertz – one billion cycles per second = 1,000,000,000Definitions of Hertz, Kilohertz, Megahertz, Gigahertz, Terahertz inspectapedia.com › emf › Electromagnetic_Frequency_Hertz_Definitions