In Roman law. The heir, or universal successor in the event of death. Theheir is he who actively or passively succeeds to tlie entire property of the estate- leaver.lie is not only the successor to the rights and claims, but also to the estate-leaver’sdebts, and in relation to his estate is to be regarded as the identical person of theestate-leaver, inasmuch as he represents him in all his active and passive relations tohis estate. Mackeld. Rom. Law,