The Collaborative International Dictionary of English v.0.48:

Homiletic \Hom`i*let"ic\, Homiletical \Hom`i*let"ic*al\, a. [Gr.
   ?: cf. F. homil['e]tique. See Homily.]
   1. Of or pertaining to familiar intercourse; social; affable;
      conversable; companionable. [R.]
      [1913 Webster]

            His virtues active, chiefly, and homiletical, not
            those lazy, sullen ones of the cloister.
                                                  --Atterbury.
      [1913 Webster]

   2. Of or pertaining to homiletics; hortatory.
      [1913 Webster]

WordNet (r) 3.0 (2006):

homiletic
    adj 1: of the nature of a homily or sermon [syn: homiletic,
           homiletical]
    2: of or relating to homiletics; "homiletic speech" [syn:
       homiletic, homiletical]