noun
: guaranteed preservation of union status or revenues obtained through clauses in a labor contract and especially through provisions for closed or union shop, maintenance of membership, preferential hiring, or the checkoff
noun
: guaranteed preservation of union status or revenues obtained through clauses in a labor contract and especially through provisions for closed or union shop, maintenance of membership, preferential hiring, or the checkoff
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012