Announcer (noun)

1. A person who makes public announcements, such as on radio or television.
2. A person who announces the start of a race or event.
3. A person who introduces performers or speakers.

Origin:

Late 19th century: from announce + -er.

Examples:

1. The radio announcer gave the weather forecast.
2. The event had a professional announcer to introduce the speakers.
3. The sports announcer called the play-by-play action.
4. The game show had a lively and engaging announcer.
5. The race had an experienced announcer to start the race.