Fourteenth Amendment citizenship
Defined in 1 dictionary — Case Law
Definitions from Case Law
United States Supreme Court
an express constitutional definition of citizenship... restricted to the combination of three factors, each and all significant: birth in the United States, naturalization in the United States, and subjection to the jurisdiction of the United States. The definition obviously did not apply to any acquisition of citizenship by being born abroad of an American parent.
Defined by the Supreme Court in - Rogers v. Bellei, 401 U.S. 815 (1971).