elopement

The act of running away from home with a paramour.

You may not have heard of the last blow—Julia's elopement; she is gone to Scotland with Yates.

[…] Jo […] was already deep in the concoction of her story, being unable to decide whether the duel should come before the elopement or after the murder.

The act of running away secretly for the purpose of getting married.

The act of running away from home (for any reason).

The act of a person with dementia or other mental illness wandering away from the area where they are safe.