foreshadow or presage
"The heavy silence at the end of the meeting seemed to announce that our project was doomed before anyone spoke a word."
to give public notice, especially for the first time; to make known
"The mayor will announce her decision on the new park plans during tonight's town hall meeting."
In plain English: To announce something means to tell people about it officially so everyone knows.
"The mayor announced that the new park would open next summer."
Usage: Use announce to describe the act of making information public or revealing something new to an audience, such as a company announcing a new product or a speaker announcing their arrival. This verb implies that the message is being shared formally so others become aware of it for the first time.
The word announce comes from the Old French anoncier, which was borrowed from Latin to mean "to report" or "relate." It originally referred to a messenger bringing news before evolving into its current sense of making a public declaration in English.