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unionize

[yoon-yuh-nahyz] /ˈyun yəˌnaɪz/
verb (used with object), unionized, unionizing.
1.
to form into a union.
2.
to organize into a labor union; bring into or incorporate in a labor union.
3.
to subject to the rules of a labor union.
verb (used without object), unionized, unionizing.
4.
to form a union.
5.
to join in a labor union.
Also, especially British, unionise.
Origin
1835-1845
1835-45; union + -ize
Related forms
unionization, noun
unionizer, noun
overunionize, verb, overunionized, overunionizing.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unionize

unionize

/ˈjuːnjəˌnaɪz/
verb
1.
to organize (workers) into a trade union
2.
to join or cause to join a trade union
3.
(transitive) to subject to the rules or codes of a trade union
4.
to join or become joined in marriage or civil partnership
Derived Forms
unionization, 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
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Word Origin and History for unionize
v.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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