[excerpt]

IMMIGRATION AND NATIONALITY ACT

[…..]

101(a)

[….]

(27)The term "special immigrant" means-

(A) an immigrant, lawfully admitted for permanent residence, who is returning from a temporary visit abroad;

(B) an immigrant who was a citizen of the United States and may, under section 324(a) or 327 of title III, apply for reacquisition of citizenship;

[….]