Definition
Means any direct or indirect act or omission which occurs in a work-related context, is prompted by internal or external reporting or by public disclosure, and which causes or may cause unjustified detriment to the reporting person
Source
Point (11) of Article 5 of Directive (EU) 2019/1937 of the European Parliament and of the Council of 23 October 2019
Link
https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:32019L1937