/chad/ , n.
1. Lake , a lake in Africa at the junction of four countries: Cameroon, Chad, Niger, and Nigeria. 5000 to 10,000 sq. mi. (13,000 to 26,000 sq. km) (seasonal variation).
2. Official name, Republic of Chad . a republic in N central Africa, E of Lake Chad: a member of the French Community; formerly part of French Equatorial Africa. 7,166,023; 501,000 sq. mi. (1,297,590 sq. km). Cap.: N'Djamena.
3. Chadic.
4. a male given name. French, Tchad (for defs. 1, 2).