unionizationnoun [ U ]
UK also unionisation uk/ˌjuːniənaɪˈzeɪʃən/us/juːnjənəˈzeɪʃən/HR, WORKPLACEthe process of forming a trade union, or organizing workers into a trade union:
Leading senators are concerned that unionization of state workers could jeopardize their traditional 5% annual pay raise.
the degree to which workers in an organization, industry, etc. belong to a trade union:
Confrontation sometimes arises between employee groups with differing levels of unionization.