Definition of calumnious in English:

calumnious

adjective

formal
  • (of a statement) false and defamatory; slanderous.

    ‘all of these charges are false and calumnious’
    ‘I was disgusted by their calumnious attack on my son's integrity’

Origin

Late 15th century: from Latin calumniosus, from calumnia calumny.

Pronunciation

calumnious

/kəˈlʌmnɪəs/