Preach v. i. [imp. & p. p. Preached p. pr. & vb. n. Preaching.]
  1. To proclaim or publish tidings; specifically, to proclaim the gospel; to discourse publicly on a religious subject, or from a text of Scripture; to deliver a sermon.
     How shall they preach, except they be sent?   --Rom. x. 15.
     From that time Jesus began to preach.   --Matt. iv. 17.
  2. To give serious advice on morals or religion; to discourse in the manner of a preacher.