lodger

noun | \ ˈlä-jər \ | lodg·er

1. : a person who occupies a rented room in another's house; specifically : a person who by agreement with the owner of a house acquires no property, interest, or possession therein but only the right to occupy a designated room or area that remains in the owner's legal possession : a person who by agreement with the owner of a house acquires no property, interest, or possession therein but only the right to occupy a designated room or area that remains in the owner's legal possession