What does grieve in a union mean?

"Grieve in a union" refers to the process of formally addressing and resolving disputes or grievances within a labor union context. It typically involves a member filing a complaint regarding violations of a contract, workplace rights, or unfair treatment. The grievance process often includes steps such as investigation, discussions, and potential arbitration to seek a resolution. This mechanism ensures that workers' rights are protected and that their concerns are heard and addressed.