noun. 1,000,000,000 periods per second.
1. Noun, singular or mass Alternatively, if you have 802.11n or later Wi-Fi technology on your router and Dell, then you can switch to use only the 5 gigahertz range. 2. Noun, plural Cellular phone signals are transmitted on two bands, one between 800 to 900 megahertz and the other between 1.8 gigahertz to 1.95 GHz.