From Longman Dictionary of Contemporary Englishnon-unionˌnon-ˈunion (also non-unionized) adjective 1 BEL[usually before noun] non-union workers do not belong to a trade union (=official organization for workers)2 BELbusinesses or organizations that are non-union do not officially accept trade unions, or do not employ their members
Examples from the Corpus
non-union• The most striking finding was that 69% of the new firms were non-union.• Are non-union and anti-union companies involved in Compacts?• This means in practice that non-union companies may participate.• A strike has been going on at the mine for over three months and the nine who died were all non-union men.• What about non-union people? 7.• The organizing committee had made the colossal error of hiring a non-union press to print the official program.• The technique involves estimating apparent consumption by deducting exports from domestic production and adding on imports from union and non-union sources.• Firms select workers at random from the pool of union and non-union workers irrespective of their union status.From Longman Business Dictionarynon-unionˌnon-ˈunion adjectiveHUMAN RESOURCES non-union workers do not belong to a TRADE UNION (=an organization that protects workers’ rights)The workers who were fired were replaced with non-union labor. 