Definition of VoIP noun from the Oxford Advanced Learner's Dictionary



BrE BrE//vɔɪp//
; NAmE NAmE//vɔɪp//
(also IP telephony) [uncountable]
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the abbreviation for voice over Internet protocol (a telephone system that allows users to make and receive calls using the Internet) the impact of VoIP services on traditional phone companies Learn how to make free VoIP calls. You can get unlimited broadband phone services with VoIP.
See the Oxford Advanced American Dictionary entry: VoIP