If you have citizenship of a country, you are legally accepted as belonging to it. [oft adj N] 国籍;公民身份；
After 15 years in the USA, he has finally decided to apply for American citizenship…
在美国生活了15年之后，他终于决定申请美国国籍。
Only people who can trace their family history in Kuwait back before 1920 are entitled to citizenship.
只有其在科威特的家族史可以追溯到1920年以前的人才能获国籍。