third-generation: pertaining to or being a mobile device or communications technology that is more advanced than the earlier two versions, using high-speed broadband to support Internet access and multimedia applications: 3G smartphones; a 3G network; Wi-Fi/3G e-readers.
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British Dictionary definitions for 3g
third-generation; a system for mobile phones allowing fast connection, internet access, digital photography, graphics transmission and display, and other advanced features
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012