1. the rules of polite behavior in society or among members of a particular profession or group

Examples

• She studied business etiquette before her job interview.
• Proper dining etiquette includes keeping your napkin on your lap.
• The ambassador was well-versed in diplomatic etiquette.
• Wedding etiquette dictates that guests should arrive on time.
• He violated email etiquette by writing in all capital letters.
• Golf etiquette requires players to repair divots on the course.
• Social media etiquette suggests avoiding controversial topics in professional posts.