What is the meaning of announcement?

noun

• A formal public statement.
  • usage: "the government made an announcement about changes in the drug war"; "a declaration of independence"
  • synonyms: proclamation, annunciation, declaration
• A public statement containing information about an event that has happened or is going to happen.
  • usage: "the announcement appeared in the local newspaper"; "the promulgation was written in English"
  • synonyms: promulgation