1. people who perform rap music, speaking rhythmic lyrics over a beat
2. people or things that knock or tap repeatedly

Examples

• The concert featured three popular rappers from different cities.
• Many rappers write their own lyrics about personal experiences.
• She studied the techniques used by famous rappers to improve her flow.
• The festival showcased both established and emerging rappers.
• The door rappers announced the arrival of visitors.
• Old-fashioned door rappers were made of heavy brass.