(philosophy) The quality of a material thing; objectivity; actuality; reality.
1994, Shadia B Drury, Alexandre Kojève http://books.google.com/books?ie=UTF-8&hl=en&vid=ISBN0312120923&id=zQRKXLwDPc4C&pg=PA26&lpg=PA26&sig=zR0NpFT9gF4Mo_VTIPTm1274piI
To live as a thing, to live for another and as the other expects, is to live unauthentically or in bad faith. To be true to oneself, one must reduce others to thingness and resist being so reduced.