The Collaborative International Dictionary of English v.0.48:

Likable \Lik"a*ble\ (l[imac]k"[.a]*b'l), a.
   Such as can be liked; such as to attract liking; easy to
   like; evoking sympathy; as, a likable person. --Thackeray.
   [WordNet sense 1+2]

   Syn: appealing, likable.
        [1913 Webster + WordNet 1.5]

   2. disposed to please. [WordNet sense 3]

   Syn: amiable, agreeable, good-humored, good-humoured,
        likable.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

likable
    adj 1: (of characters in literature or drama) evoking empathic
           or sympathetic feelings; "the sympathetic characters in
           the play" [syn: sympathetic, appealing, likeable,
           likable] [ant: unappealing, unlikable,
           unlikeable, unsympathetic]
    2: easy to like; agreeable; "an attractive and likable young
       man" [syn: likable, likeable]