collective bargaining

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Negotiation between organized workers and their employer or employers to determine wages, hours, rules, and working conditions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A method of negotiation in which employees negotiate as a group with their employers, usually via a trade union

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun negotiation between an employer and trade union