The stage when two people are in love and plan on getting engaged and married someday but are either too young or not ready to head to that stage yet. This term helps to show that you are at a higher level of commitment than in a normal relationship. This is an engagement without a proposal essentially.
He didn't propose yet, we are just pre-fiances for now, but he'll propose eventually.
A term people use when they want their relationship with their significant other to sound more serious than it actually is. Usually used by insecure or desperate individuals.
I referred to my boyfriend as my future fiance when my landlord asked me who was moving into my place.
When a couple has been "dating" for such a long time that they are on an inevitable path to marriage, the participants in the relationship become common law fiancés, even if no formal commitment to get married has been made. Often, the involved parties deny this de facto status, frequently out of fear of commitment or embarrassment over not taking their relationship to the next level. However, they usually conduct themselves like a typical engaged couple (e.g., sharing holidays with both sets of families, etc.)
Aaron: hey, is your fiance coming to dinner with us?
Mike: no, my girlfriend cannot make dinner tonight
Aaron: she is so your common law fiance...you guys have been together for more than 6 years!