Definition
VERY HIGH FREQUENCY (VHF)
The frequency band between 30 and 300 MHz. Portions of this band, 108 to 118 MHz, are used for certain NAVAIDs; 118 to 136 MHz are used for civil air/ground voice communications. Other frequencies in this band are used for purposes not related to air traffic control.
Source: FAA Pilot/Controller Glossary (verbatim from the Federal Aviation Regulations).