[ yoon-yuh-nahyz ]
See synonyms for: unionized on Thesaurus.com

verb (used with object),un·ion·ized, un·ion·iz·ing.
  1. to organize into a labor union; bring into or incorporate in a labor union.

  2. to subject to the rules of a labor union.

  1. Obsolete. to form into a union.

verb (used without object),un·ion·ized, un·ion·iz·ing.
  1. to join in a labor union.

  2. Obsolete. to form a union.

Origin of unionize

First recorded in 1835–45; union + -ize
  • Also especially British, un·ion·ise .

Other words from unionize

  • un·ion·i·za·tion [yoon-yuh-nahy-zey-shuhn], /ˌyun yə naɪˈzeɪ ʃən/, noun
  • un·ion·iz·er, noun
  • o·ver·un·ion·ize, verb, o·ver·un·ion·ized, o·ver·un·ion·iz·ing.

Words Nearby unionize

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use unionize in a sentence

British Dictionary definitions for unionize



/ (ˈjuːnjəˌnaɪz) /

  1. to organize (workers) into a trade union

  2. to join or cause to join a trade union

  1. (tr) to subject to the rules or codes of a trade union

  2. to join or become joined in marriage or civil partnership

Derived forms of unionize

  • unionization or unionisation, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012