What is EDGE (Enhanced Data rates for GSM Evolution)?

EDGE (Enhanced Data rates for GSM Evolution) definition

EDGE is the data system used at the top of GSM network to offer better data speed than speed offered by existing GPRS. EDGE is also referred as EGPRS. Technically, it is a superset to GPRS and is also considered a pre-3G technology. This is the reason it is usually classified as 2.75G.