type of security operative or government agent who protects a person or persons
Two bodyguards, protecting the Turkish Prime Minister Recep Tayyip Erdoğan during Hannover Fair 2007
Bodyguards of Viktor Yushchenko (far left) after leaving Gdansk city hall.

A Bodyguard is a security guard who physically protects a person against injury. Very often, important people, like heads of state, religious leaders (i.e. the Pope), actors, and powerful or rich people have bodyguards.