The document defines grievance in two contexts: (1) In law, it refers to an injury, injustice, or wrong that allows for resistance or a formal complaint. It also refers to the complaint itself. (2) In human resources, it is a specific employee complaint related to pay, job requirements, work conditions, employment aspects, or an alleged violation of a collective bargaining agreement. The document also provides an additional definition of grievance as referring to a period of sadness, sorrow or regret over something lost.