a. A building or complex in which units of property, such as apartments, are owned by individuals and common parts of the property, such as the grounds and building structure, are owned jointly by the unit owners.

b. A unit in such a complex.

a. Joint sovereignty, especially joint rule of territory by two or more nations, or a plan to achieve it: "The allies would fear that they were pawns in a superpower condominium" (New Republic).

b. A politically dependent territory.