To announce is to provide information through speaking or writing. An announcement usually regards something that is important.

simple	past	past participle
announce	announced	announced

• Maria and David announced that they were getting married.
• Walter will announce his decision to leave the company or remain where he is.
• Amina was thrilled to announce that she’s expecting a baby.
• The airline announced that flights would be delayed due to bad weather.

The word “announcement” is a noun:

• Did you hear the announcement?
• The teacher made an important announcement.
• Daily announcements at school are made over the intercom.
• Wedding announcements are sent out several months before a big wedding takes place.

A person who make announcements is called an announcer.

• Radio announcers inform listeners of the time, the weather, and the latest news.
• Football announcers describe what is happening during a football game.
• The announcer could not be heard because the public address (P.A.) system was full of static.

He needs to make an announcement.