noun
United Nations member state; UN member
Refers to a sovereign state that is a member of the United Nations. Used in political, diplomatic, and news contexts.
日本は1956年に国連加盟国になった。
Japan became a UN member state in 1956.
国連加盟国は現在193か国ある。
There are currently 193 UN member states.
Compound of 国連 (United Nations) + 加盟 (affiliation, membership) + 国 (country).