What is Passenger ?
Passenger is (noun) a person who is travelling, e.g. in a car, bus, train or plane, but who is not the driver or one of the crew His car’s quite big it can take three passengers on the back seat. The plane was carrying 104 passengers and a crew of ten. there was a dent on the passenger side there was a dent in the side of the car nearest to the kerb
source: Easier English, Student Dictionary Upper Intermediate Level