What does the word caustic mean?

Usage examples for caustic

  1. The Baroness was devoid of religious feelings, and she became, therefore, the most bitter and caustic of cynical critics at heart, though she guarded her expression of these sentiments from policy. – An Ambitious Man by Ella Wheeler Wilcox
  2. After a good deal of persuasion, for he was at first quite frightened at me, he consented to allow me to apply the caustic. – Travels in the Great Desert of Sahara, in the Years of 1845 and 1846 by James Richardson
  3. Mr. Dodge recovered his temper now that he saw a chance of disconcerting his caustic visitor. – A Mysterious Disappearance by Gordon Holmes