unowned

from WordNet (r) 3.0 (2006)

unowned
    adj 1: having no owner [syn: {unowned}, {ownerless}] [ant:
           {owned}]

from The Collaborative International Dictionary of English v.0.48

Unowned \Un*own"ed\, a. [Pref. un- not + (sense 1) owned
   possessed, and (sense 2) owned granted, acknowledged.]
   [1913 Webster]
   1. Not owned; having no owner. --Milton.
      [1913 Webster]

   2. Not acknowledged; not avowed. --Gay.
      [1913 Webster]