Immigration DictionaryLegal Terms Explained In Plain English#ABCDEFGHIJKLMNOPQRSTUVWXYZK-1 VisaFiancee or Fiance of United States Citizen.K-2 VisaChild of Fiance(e) of U.S. Citizen.K-3 VisaSpouse of a U.S. Citizen.K-4 VisaChildren of K-3 visa holders.