top-level domain
/ˈtɒplˈɛvəl dəmˈeɪn/
n
English · top-level domain中文 · 顶级域名Español · dominio de primer nivelFrançais · domaine de premier niveau
意味：Part of the domain name that designates the country of origin or the category of organization (including government agency, commercial business and educational institution).