Generic Routing Encapsulationcomputing dictionary

<networking, protocol> (GRE) A protocol which allows an arbitrary network protocol A to be transmitted over any other arbitrary network protocol B, by encapsulating the packets of A within GRE packets, which in turn are contained within packets of B.

Defined in RFC 1701 and RFC 1702 (GRE over IP).

Acronym: GRE

(01 Apr 1998)