The Full Form of MEF is Metro Ethernet Forum.

MEF, founded in 2001, is a nonprofit international industry consortium, leading the development of a global federation of network, cloud, and technology providers. The forum works to enable dynamic, trusted, and certified services that empower enterprises to embrace their own digital transformation and grow their business. MEF, originally know as the Metro Ethernet Forum, was dedicated to Carrier Ethernet networks and services, and in recent years, significantly broadened its scope, which now includes underlay connectivity services such as Optical, Carrier Ethernet, IP, along with overlay digital services including SD-WAN Services, as well as APIs to support orchestration of the service lifecycle (termed Lifecycle Service Orchestration, or LSO APIs based on MEF 55 Lifecycle Service Orchestration (LSO): Reference Architecture and Framework, for connectivity and digital services. Along with this change in scope, MEF re-branded from the “Metro Ethernet Forum”, to simply “MEF”. “MEF Forum” is MEF’s legal name.