Definitions for unionizeˈyun yəˌnaɪz
Random House Webster's College Dictionary
un•ion•izeˈyun yəˌnaɪz(v.)-ized, -iz•ing.
(v.t.)to organize (workers) into a labor union.
(v.i.)to join in or form a labor union.
Origin of unionize:
recruit for a union or organize into a union
"We don't allow people to come into our plant and try to unionize the workers"
unionize, unionise, organize, organise(verb)
form or join a union
"The auto workers decided to unionize"
To organize workers into a union.