A geographic region of continental Asia, south of China, west of the South Pacific Ocean, north of the Indian Ocean, and east of the Bay of Bengal and the Indian subcontinent, including the Indochina Peninsula, the Malay Peninsula and the Indonesian and Philippine Archipelagos, and countries such as Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Vietnam.
a geographical division of Asia that includes Indochina plus Indonesia and the Philippines and Singapore