noun, noun or participle which takes 'suru', intransitive verb
joining; participation; affiliation; accession
Formal term for joining an organization, treaty, or agreement. Often used in political, business, and international contexts.
日本はその条約に加盟した。
Japan acceded to the treaty.
新たに三カ国が国連に加盟した。
Three new countries joined the United Nations.