Third World

Từ điển Oxford Advanced Learner 8th

the ˌThird ˈWorld BrE NAmE noun singular
a way of referring to the poor or developing countries of Africa, Asia and Latin America, which is sometimes considered offensive
•the causes of poverty and injustice in the Third World
•Third-World debt
compare ↑First World

Word Origin:
[Third World] first applied in the 1950s by French commentators who used tiers monde to distinguish the developing countries from the capitalist and Communist blocs.