Source : Webster's Revised Unabridged Dictionary (1913)

Homiletics \Hom`i*let"ics\, n. [Cf. F. homil['e]tique.]
   The art of preaching; that branch of theology which treats of
   homilies or sermons, and the best method of preparing and
   delivering them.

Source : WordNet®

homiletics
     n 1: the branch of theology that deals with sermons and homilies
     2: the art of preaching