Definition
Means: (a) an electronic communications network within the meaning of point (a) of Article 2 of Directive 2002/21/EC; (b) any device or group of interconnected or related devices, one or more of which, pursuant to a program, perform automatic processing of digital data; or (c) digital data stored, processed, retrieved or transmitted by elements covered under points (a) and (b) for the purposes of their operation, use, protection and maintenance
Source
Point (1) of Article 4 of Directive (EU) 2016/1148 of the European Parliament and of the Council of 6 July 2016
Link
https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32016L1148&rid=1