occupant
/ˈɒkjʊpənt/noun
1- a person who resides or is present in a house, vehicle, seat, place, etc. at a given time居住者; （车辆的）乘坐者; （座位的）占有者; （地方的）占用者。
1.1
- the holder of a position or office（职位或官职的）占有者：
the first occupant of the Chair of Botany.
首任植物学教授。
1.2
- Law a person holding property, especially land, in actual possession【律】（尤指土地的）实际占有人。
词源
late 16th cent. （in the legal sense 'person who establishes a title'）： from French, or from Latin occupant- 'seizing', from the verb occupare.