There are multiple definitions - click on the translation that matches your context.

pasażer

rzeczownik

full

occupant

noun

Definitions of occupant

a person who is in a vehicle at a particular time; a person who is in a place or a room at a particular time

ATX may monitor and record conversations between ATX's response center specialists and your vehicle's occupants.If the number of persons that regularly uses or occupies the office(s) increase, an excess occupant fee may be charged for each such additional person.

a person who lives or works in a room, piece of land, or building

In the event of the outbreak of fire you should immediately warn the occupants of the building.