the Argentine thear·gen·tine uncommon noun 1. a republic in southern South America; second largest country in South America SynonymsArgentinaArgentine Republicthe Argentine Related words Broader terms South American country Parts South AmericaOrganization of American States Part of PatagoniaTriple FrontierBuenos AiresCordobapampasTierra del FuegoAconcaguaAndes WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.