Someone who escorts and protects a prominent person WordNet 3.0 & Open English WordNet

A bodyguard is a type of security guard, government law enforcement officer, or servicemember who protects a person or a group of people — usually witnesses, high-ranking public officials or officers, wealthy people, and celebrities — from danger: generally theft, assault, kidnapping, assassination, harassment, loss of confidential information, threats, or other criminal offences. Wikipedia

Individual who protects another from harm or threats. Wikipedia Disambiguation

Type of security operative or government agent who protects a person or persons Wikidata

A person or group of persons, often armed, responsible for protecting an individual. Wiktionary

Person responsible for protecting an individual. Wiktionary (translation)

A guard who travels with a dangerous person, such as a criminal, for the protection of others. Wiktionary