Definition from Wiktionary, the free dictionary
- to undo the action of marrying.
1883, Anthony Trollope, Mr. Scarborough's Family:
- But there can be no doubt that John Scarborough and Ada Sneyd were married at Rummelsburg, and that it will be found to be impossible to unmarry them."
1909, Miles Franklin, Some Everyday Folk and Dawn:
- If you like to exercise your authority I'll run away and you can't unmarry me.