noun
fiancé; fiancée
Borrowed from French; used for a person one is engaged to marry. Gender is not distinguished in Japanese spelling.
from French fiancé(e)
彼女は私のフィアンセです。
She is my fiancée.
フィアンセと結婚式の準備をしている。
I'm preparing for the wedding with my fiancé.
A more formal, native Japanese term for a fiancé(e). フィアンセ is a common loanword with a slightly more casual or Western feel.
From French 'fiancé(e)', borrowed into Japanese as a katakana loanword.