| Noun | 1. | heir - a person who is entitled by law or by the terms of a will to inherit the estate of anotherheir apparent - an heir whose right to an inheritance cannot be defeated if that person outlives the ancestor heir-at-law - the person legally entitled to inherit the property of someone who dies intestate heir presumptive - a person who expects to inherit but whose right can be defeated by the birth of a nearer relative | |