What is "to preach down"

Preach \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.''
   --Ps. xl. 9.

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.''
   --Southey.

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.