Preach, v. t.
  1. To proclaim by public discourse; to utter in a sermon or a formal religious harangue.
     That Cristes gospel truly wolde preche.   --Chaucer.
     The Lord hath anointed me to preach good tidings unto the meek.   --Isa. lxi. 1.
  2. To inculcate in public discourse; to urge with earnestness by public teaching. “I have preached righteousness in the great congregation.”
  3. To deliver or pronounce; as, to preach a sermon.
  4. To teach or instruct by preaching; to inform by preaching. [R.] “As ye are preached.”
  5. To advise or recommend earnestly.
     My master preaches patience to him.   --Shak.
  To preach down, to oppress, or humiliate by preaching. --Tennyson.
  To preach up, to exalt by preaching; to preach in support of; as, to preach up equality.