Source : Webster's Revised Unabridged Dictionary (1913)

Screed \Screed\ (skr[=e]d), n. [Prov. E., a shred, the border of
   a cap. See {Shred}.]
   1. (Arch.)
      (a) A strip of plaster of the thickness proposed for the
          coat, applied to the wall at intervals of four or five
          feet, as a guide.
      (b) A wooden straightedge used to lay across the plaster
          screed, as a limit for the thickness of the coat.

   2. A fragment; a portion; a shred. [Scot.]

Screed \Screed\, n. [See 1st {Screed}. For sense 2 cf. also
   Gael. sgread an outcry.]
   1. A breach or rent; a breaking forth into a loud, shrill
      sound; as, martial screeds.

   2. An harangue; a long tirade on any subject.

            The old carl gae them a screed of doctrine; ye might
            have heard him a mile down the wind.  --Sir W.
                                                  Scott.

Source : WordNet®

screed
     n 1: a long monotonous harangue
     2: a long piece of writing
     3: an accurately levelled strip of material placed on a wall or
        floor as guide for the even application of plaster or
        concrete