un•ion•izePronunciation: (yOOn'yu-nīz"), [key]
—v., -ized, -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.
to form a union.
to join in a labor union. Also, esp. Brit.,un'ion•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.