Source : Webster's Revised Unabridged Dictionary (1913)

Sermonize \Ser"mon*ize\, v. i. [imp. & p. p. {Sermonized}; p.
   pr. & vb. n. {Sermonizing}.]
   1. To compose or write a sermon or sermons; to preach.

   2. To inculcate rigid rules. [R.] --Chesterfield.