Third-person singular simple present indicative form of unionize

(transitive, intransitive) To organize workers into a union.

simple past tense and past participle of unionize

(participial adjective, of workers, workforces, companies, or industries) Organized into a trades union or trades unions.

Alternative form of un-ionized

plural of Union

(politics) The act of forming a labor union.

(chemistry, rare, nonstandard) Synonym of deionization.

plural of unionization

The support of advocacy of a union, especially of a trade union. / (often capitalised) Support for the North (the Union) during the American Civil War.