Source : Webster's Revised Unabridged Dictionary (1913)

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

   2. Not acknowledged; not avowed. --Gay.

Source : WordNet®

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