Definitions of coheir
somebody who is an heir (=a person who will receive money, property, assets or a title from someone when that person dies) together with one or more other people
Where the deceased has not made a will and one of two or more coheirs disclaims the inheritance, his or her share of the estate passes to the other heirs as if he or she had predeceased.
Additional Notes for coheir
The term coheiress is sometimes used to refer to one of two or more women who will receive money, property, assets or a title from someone when that person dies: When he died, he left three coheiresses, his daughters.