The Collaborative International Dictionary of English v.0.48:

Likeness \Like"ness\, n. [AS. gel[imac]cnes.]
   1. The state or quality of being like; similitude;
      resemblance; similarity; as, the likeness of the one to
      the other is remarkable.
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   2. Appearance or form; guise.
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            An enemy in the likeness of a friend. --L'Estrange.
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   3. That which closely resembles; a portrait.
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            [How he looked] the likenesses of him which still
            remain enable us to imagine.          --Macaulay.
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   4. A comparison; parable; proverb. [Obs.]
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            He said to them, Soothly ye shall say to me this
            likeness, Leech, heal thyself.        --Wyclif (Luke
                                                  iv. 23).

   Syn: Similarity; parallel; similitude; representation;
        portrait; effigy.
        [1913 Webster] Likerous

WordNet (r) 3.0 (2006):

likeness
    n 1: similarity in appearance or character or nature between
         persons or things; "man created God in his own likeness"
         [syn: likeness, alikeness, similitude] [ant:
         dissimilitude, unlikeness]
    2: picture consisting of a graphic image of a person or thing
       [syn: likeness, semblance]