"If you plan to get married, you're engaged, ring or no ring, wedding date booked or not"
Unless it is discussed, then many women may think that they are heading for marriage, but go on the relationship boards and you see that, that often isn't the case.
My DD has been with her DP since they were 17, there have been lots of changes, all discussed and points of possible issues gone through, including house chores.
The same is happening over childcare before they concieve.
If you think of an arranged marriage, or match maker situation (when Engagement was started) the couple meet because they want to marry, someone, but it is only when the pledge is made, they are married.
Inbetween, a lot of practical arrangements are discussed.
I suppose it depends on what you consider your cultural background.