What is the meaning of denounce?

verb

• Speak out against.
  • usage: "He denounced the Nazis"
• To accuse or condemn or openly or formally or brand as disgraceful.
  • usage: "He denounced the government action"; "She was stigmatized by society because she had a child out of wedlock"
  • synonyms: stigmatize, stigmatise, brand, mark
• Announce the termination of, as of treaties.
• Give away information about somebody.
  • usage: "He told on his classmate who had cheated on the exam"
  • synonyms: tell on, betray, give away, rat, grass, shit, shop, snitch, stag