vol·tair·i·an·ism \ ̷ ̷ˈ ̷ ̷rēəˌnizəm\noun (-s) Usage: usually capitalized Etymology:Voltaire died 1778 French writer + English -ianism (as in trinitarianism) : the theories or practices of Voltaire characterized by a skeptical but deistic religious attitude, opposition to intolerance, and castigation of bigotry