fiance
Concise Oxford English Dictionary © 2008 Oxford University Press:
fiancé /fɪˈɒnseɪ, -ˈɑːns-, -ˈɒ̃s-/
▶noun (fem. fiancée pronunc. same) a person to whom another is engaged to be married.
– origin C19: from Fr., past part. of fiancer ‘betroth’.
'fiance' also found in these Oxford entries:

