[ yoon-yuh-nahyz ]
/ ˈyun yəˌnaɪz /

verb (used with object), un·ion·ized, un·ion·iz·ing.

to form into a union.
to organize into a labor union; bring into or incorporate in a labor union.
to subject to the rules of a labor union.

verb (used without object), un·ion·ized, un·ion·iz·ing.

to form a union.
to join in a labor union.

Nearby words

  1. uniondale,
  2. unionism,
  3. unionist,
  4. unionist party,
  5. unionization,
  6. unionized,
  7. uniontown,
  8. uniovular,
  9. uniparental,
  10. uniparous

Also especially British, un·ion·ise.

Origin of unionize

First recorded in 1835–45; union + -ize

Related formsun·ion·i·za·tion, nounun·ion·iz·er, nouno·ver·un·ion·ize, verb, o·ver·un·ion·ized, o·ver·un·ion·iz·ing.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unionization

British Dictionary definitions for unionization



/ (ˈjuːnjəˌnaɪz) /


to organize (workers) into a trade union
to join or cause to join a trade union
(tr) to subject to the rules or codes of a trade union
to join or become joined in marriage or civil partnership
Derived Formsunionization 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

Word Origin and History for unionization



"make into a union," 1841, from union + -ize. Related: Unionized; unionizing.

Online Etymology Dictionary, © 2010 Douglas Harper