What does the word calumnious mean?

Usage examples for calumnious

  1. Nor did he cease his intrigues against Scipio until by calumnious and false accusations he drove him out of Rome, and stigmatized his brother with the disgraceful charge of embezzling the public money. – Plutarch's Lives, Volume II by Aubrey Stewart & George Long
  2. Young women, in his opinion, could hardly be too careful, in a calumnious world. – The Testing of Diana Mallory by Mrs. Humphry Ward