The Collaborative International Dictionary of English v.0.48:

Own \Own\ ([=o]n), v. t. [OE. unnen to grant, permit, be pleased
   with, AS. unnan to grant; akin to OS. giunnan, G. g["o]nnen,
   Icel. unna; of uncertain origin. This word has been confused
   with own to possess.]
   To grant; to acknowledge; to admit to be true; to confess; to
   recognize in a particular character; as, we own that we have
   forfeited your love.
   [1913 Webster]

         The wakeful bloodhound rose, and shook his hide;
         But his sagacious eye an inmate owns.    --Keats.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Own \Own\, a. [OE. owen, awen, auen, aughen, AS. [=a]gen, p. p.
   of [=a]gan to possess; akin to OS. [=e]gan, G. & D. eigen,
   Icel. eiginn, Sw. & Dan. egen. [root]110. See Owe.]
   Belonging to; belonging exclusively or especially to;
   peculiar; -- most frequently following a possessive pronoun,
   as my, our, thy, your, his, her, its, their, in order to
   emphasize or intensify the idea of property, peculiar
   interest, or exclusive ownership; as, my own father; my own
   composition; my own idea; at my own price. "No man was his
   own [i. e., no man was master of himself, or in possession of
   his senses]." --Shak.
   [1913 Webster]

   To hold one's own, to keep or maintain one's possessions;
      to yield nothing; esp., to suffer no loss or disadvantage
      in a contest. --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Own \Own\, v. t. [imp. & p. p. Owned; p. pr. & vb. n.
   Owning.] [OE. ohnien, ahnien, AS. [=a]gnian, fr. [=a]gen
   own, a. See Own, a.]
   To hold as property; to have a legal or rightful title to; to
   be the proprietor or possessor of; to possess; as, to own a
   house.
   [1913 Webster]

WordNet (r) 3.0 (2006):

own
    adj 1: belonging to or on behalf of a specified person
           (especially yourself); preceded by a possessive; "for
           your own use"; "do your own thing"; "she makes her own
           clothes"; "`ain' is Scottish" [syn: own(a), ain]
    v 1: have ownership or possession of; "He owns three houses in
         Florida"; "How many cars does she have?" [syn: own,
         have, possess]

Moby Thesaurus II by Grady Ward, 1.0:

47 Moby Thesaurus words for "own":
   accept, acknowledge, admit, admit everything, agree provisionally,
   allow, assent grudgingly, avow, by one, come clean, concede,
   confess, cop a plea, enjoy, express general agreement,
   free and clear, go along with, grant, have, have title to, held,
   hold, in fee, in fee simple, in hand, in seisin, in stock,
   in store, let on, not oppose, on hand, open up, out with it,
   own up, owned, plead guilty, possess, possessed, recognize, retain,
   spill, spill it, spit it out, tell all, tell the truth, warrant,
   yield