propertyとは何ですか？ propertyとは何ですか？ Something owned; a possession.A piece of real estate: has a swimming pool on the property. Something tangible or intangible to which its owner has legal title: properties such as copyrights and trademarks. Possessions considered as a group.The right of ownership; title.An article, except costumes and scenery, that appears on the stage or on screen during a dramatic performance.A characteristic trait or peculiarity, especially one serving to define or describe its possessor.A characteristic attribute possessed by all members of a class. See Synonyms at quality.A special capability or power; a virtue: the chemical properties of a metal.