In the civU law. The prlvate and exclusive ownership or dominion of an individual. Things capable of belng possessed by a single person to the exclusion of all others (or which are actually so pos-sessed) are said to be in patrimonio; if not capable of being so possessed, (or not act* nally so possessed,) they are said to be extra patrimonium. See Gaius, bk. 2, $ 1