mutual wills
Also found in: Financial.
mutual wills
n. wills made by two people (usually spouses, but could be "partners") in which each gives his/her estate to the other, or with dispositions they both agree upon. A later change by either party is valid unless it can be proved that there was a contract in which each made his/her will in the consideration for the other person making his/her will as written. (See: mirror wills)