1. people who introduce programs or read news on radio or television
2. people who provide commentary during sports events
3. people who make public announcements or declarations

Examples

• The radio announcers discussed the morning news.
• Sports announcers called the exciting playoff game.
• Television announcers introduced the evening program.
• The announcers at the train station made boarding calls.
• Local announcers covered the community festival.
• Weather announcers warned about the approaching storm.