Calumnious \Ca*lum"ni*ous\, a. [L. calumniosus.] Containing or implying calumny; false, malicious, and injurious to reputation; slanderous; as, calumnious reports. Virtue itself 'scapes not calumnious strokes. --Shak. Syn: . Slanderous; defamatory; scurrilous; opprobrious; derogatory; libelous; abusive. -- {Ca*lum"ni*ous*ly}, adv. -- {Ca*lum"ni*ous*ness}, n.