An announcement is a public statement that's usually formal and has a specific purpose.

There are many kinds of announcements, but they're all public and meant to inform. In school, the announcements might say whose birthday it is and what clubs are meeting after school. In a store, an announcement might mention a sale or a lost kid who's looking for her parents. The President makes lots of formal announcements, like the decision to run for re-election. So basically, if it's announcing something, it's an announcement.

Definitions of announcement

n a public statement containing information about an event that has happened or is going to happen

“the announcement appeared in the local newspaper”
(Christianity) the announcement to the Virgin Mary by the angel Gabriel of the incarnation of Christ
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an announcement that usually advises or warns the public of some threat
a public announcement of a proposed marriage
handout, press release, release
an announcement distributed to members of the press in order to supplement or replace an oral presentation
an announcement containing information about an event
program, programme
an announcement of the events that will occur as part of a theatrical or sporting event
wanted notice, wanted poster
a public announcement by a law enforcement agency that they desire to question or arrest some person
(law) a formal notice filed with a court or officer to suspend a proceeding until filer is given a hearing
necrology, obit, obituary
a notice of someone's death; usually includes a short biography
a theatrical program
a program for a race meeting; lists the races and the names of the horses
International Wanted Notice, Red Notice
an Interpol notice describing a wanted person and asking that he or she be arrested with a view to extradition; a wanted notice that is issued by Interpol at the request of an Interpol member country and distributed to all member countries
Type of:
a message that is stated or declared; a communication (oral or written) setting forth particulars or facts etc

n a formal public statement

“the government made an announcement about changes in the drug war”
annunciation, declaration, proclamation
a formal or authoritative proclamation
the official announcement of a new law or ordinance whereby the law or ordinance is put into effect
Type of:
a message that is stated or declared; a communication (oral or written) setting forth particulars or facts etc

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