- an area of Southeast Asia encompassing parts of Myanmar (Burma), Laos, and Thailand, significant as a major source of opium and heroin.
- the peninsula enclosed by Lakes Ontario, Erie, and Huron.
- an opium-producing area of SE Asia, comprising parts of Myanmar, Laos, and Thailand
- any more or less triangular area or region noted for its success, prosperity, influence, etc
- a triangle which has two 72-degree angles and one 36-degree angle
