In some States if a company is unionized, then you can only work at that company if you become a union member in good standing after a certain period of time, usually 30 days. If, for some reason (don't pay dues, brought up on charges for doing something against the Union or "brother/sister" member), you cease to be a member in good standing, then you not only lose your union membership, but also your job, because only union members can work at that company. A Right to Work State, I believe, is a State wherein even if you are not a member of a union and a company is unionized, you have the right to work and stay a non-member of the union. Non-union people working together with union people is called an "open shop." Union members only is a "closed shop." In otherwords, a Right to Work State, I think, is a State wherein you have the right to work anywhere without being forced to becoming a member of any organization and/or labor organization.