A country that is still in the process of economic and social development; a developing country, often with lower living standards and infrastructure than developed countries.
多くの発展途上国では基礎教育へのアクセスが重要な課題になっている。
In many developing countries, access to basic education is an important issue.
彼は発展途上国での支援プロジェクトに参加した。
He participated in a support project in a developing country.
発展途上国と先進国の経済格差が国際問題になっている。
The economic gap between developing and developed countries has become an international issue.