- large peninsula south of China, including Laos, Cambodia, Myanmar, Thailand, Vietnam, & the Malay Peninsula
- E part of this peninsula, formerly under French control, consisting of Laos, Cambodia, & Vietnam
- A peninsula of southeast Asia comprising Vietnam, Laos, Cambodia, Thailand, Myanmar (Burma), and the mainland territory of Malaysia. The area was influenced in early times by the cultures of India and China.
- The former French colonial empire in southeast Asia, including much of the eastern part of the Indochinese peninsula. French influence extended from roughly 1858 to the fall of Dien Bien Phu (1954).