Eritrea /ˌɛɹɪˈtɹeɪ.ə/ noun4 •A country in East Africa, on the Red Sea. Capital: Asmara. •The modern State of Eritrea (since the 1990s).Close to the border with Eritrea, its ethereal, Martian landscape sits within the Danakil Depression. — 2025 •(historical) A former province of or in union with Ethiopia. •(historical) A former colony of Italy.