Definition of 4G abbreviation from the Oxford Advanced Learner's Dictionary

 

4G

 abbreviation
abbreviation
BrE BrE//ˌfɔː ˈdʒiː//
 
; NAmE NAmE//ˌfɔːr ˈdʒiː//
 
 
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fourth generation (used to describe a level of performance for mobile/cell phones that makes it possible to move data to and from the Internet at high speed) a 4G phone 4G technology