What is the Full Form of PAX in Hotel Industry? What does PAX stand for? Know the expanded meaning of PAX . Pax - Definition , Etymology, Historical Significance, and Usage Definition : The term “ Pax ” is derived from Latin, meaning “peace”. It is used to denote a period of peace enforced by a dominant power, often referencing various historically significant peaceful periods such as “ Pax Romana” or “ Pax Britannica”. Check online for what is PAX , meanings of PAX , and other abbreviation, acronym, and synonyms. The term " pax " is a short form of "passenger" or "person" and is commonly used in the travel, hospitality, and event management industries. In Travel & Aviation: Refers to the number of passengers on a flight, train, or bus. In Hotels & Restaurants: Used to indicate how many people a booking is for.