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Verb: unionize  'yoon-yu,nIz [N. Amer], 'yoo-nee-u,nIz [Brit]
  1. Form, join, or organize a labour union
    "The factory workers voted to unionize";
    - unionise [Brit], organize, organise [Brit]

Derived forms: unionizing, unionizes, unionized

Type of: fall in, join

Encyclopedia: Unionize