1. a system of rules that explain the correct conduct and procedures to be followed in formal situations
2. an official record of a diplomatic meeting or treaty
Usage: formal; diplomatic
3. a set of rules governing the exchange or transmission of data between devices
Usage: computing; technical

Examples

• The ambassador followed diplomatic protocol during the state dinner.
• Hospital staff must follow strict safety protocols.
• The research team developed a new protocol for the clinical trial.
• Internet protocols govern how data is transmitted online.
• Wedding protocol requires the bride’s family to sit on the left side.
• The peace protocol was signed by both nations.
• Network protocols ensure secure communication between computers.