What is Condominium ?
Condominium is (noun) 1. a system of rule of an area by two countries together 2. US a building where each apartment is owned by the person who lives in it They’re building a condominium on the site of the old hospital. 3. US an apartment in a condominium His cousin has just bought an expensive condominium in Malibu. (NOTE: [senses 2 and 3] often shortened to condo)
source: Easier English, Student Dictionary Upper Intermediate Level