Added 9 October 2026 unionize /ˈjuːnjənaɪz/ verb Categories: SocietyRare Words verb ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about unionize at Wordnik → Where our words come from → Recruit for a union or organize into a union. We don't allow people to come into our plant and try to unionize the workers Form or join a union. The auto workers decided to unionize Related Words: organizeallyunionisejoininteruniteunifyfederalizeunitarizeorganifycooperativizecollectiviseidentify Back to today's word