Ruiz de Alarcón y Mendoza, JuanPronunciation: /rʊˌiːθ deɪ ˌalɑːˈkɒn iː mɛnˌdəʊsə, ˌrrwiθ de alarˈkon i menˌdoθa, ˌrrwis, menˌdosa/Definition of Ruiz de Alarcón y Mendoza, Juan (1580–1639), Spanish dramatist, born in Mexico City. His most famous play, the moral comedy La Verdad sospechosa, was the basis of Corneille’s Le Menteur (1642).