a. 1. Given or disposed to slander; uttering slander. “Slanderous tongue.” Shak. [ 1913 Webster ]
2. Embodying or containing slander; calumnious; as, slanderous words, speeches, or reports. [ 1913 Webster ]
-- Slan"der*ous*ly, adv. -- Slan"der*ous*ness, n. [ 1913 Webster ]