The Collaborative International Dictionary of English v.0.48:

Humane \Hu*mane"\, a. [L. humanus: cf. F. humain. See Human.]
   1. Pertaining to man; human. [Obs.] --Jer. Taylor.
      [1913 Webster]

   2. Having the feelings and inclinations creditable to man;
      having a disposition to treat other human beings or
      animals with kindness; kind; benevolent.
      [1913 Webster]

            Of an exceeding courteous and humane inclination.
                                                  --Sportswood.
      [1913 Webster]

   3. Humanizing; exalting; tending to refine.

   Syn: Kind; sympathizing; benevolent; mild; compassionate;
        gentle; tender; merciful. -- Hu*mane"ly, adv. --
        Hu*mane"ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

humane
    adj 1: pertaining to or concerned with the humanities;
           "humanistic studies"; "a humane education" [syn:
           humanist, humanistic, humane]
    2: marked or motivated by concern with the alleviation of
       suffering [ant: inhumane]
    3: showing evidence of moral and intellectual advancement

Moby Thesaurus II by Grady Ward, 1.0:

56 Moby Thesaurus words for "humane":
   Christian, Christlike, Christly, accepting, affectionate,
   altruistic, benevolent, benign, benignant, bleeding, brotherly,
   charitable, chickenhearted, clement, commiserative, compassionate,
   condolent, decent, easy, easygoing, eleemosynary, forbearant,
   forbearing, forgiving, fraternal, gentle, good, gracious, human,
   humanitarian, kind, kindhearted, kindly, kindly-disposed, lax,
   lenient, loving, melting, merciful, mild, moderate, nice, patient,
   philanthropic, pitying, ruthful, soft, softhearted, sympathetic,
   sympathizing, tender, tenderhearted, tolerant, understanding, warm,
   warmhearted