Definition from Wiktionary, the free dictionary
screed (plural screeds)
- A long discourse or harangue.
- One of the more regular correspondents to the club was an Everton fan, who’d send in an abusive screed each time Albion were due to play on Merseyside. He directed this at Atkinson, urging him not to select his “monkeys” for the game. 
- A piece of writing.
- A tool, usually a long strip of wood or other material, for producing a smooth, flat surface on, for example, a concrete floor or a plaster wall.
- A smooth flat layer of concrete or similar material.
- (impassioned and angry discourse): diatribe, harangue, polemic, rant, tirade
- (smooth flat layer of concrete or similar material): slab
smooth flat layer of concrete or similar material
- (construction, masonry) To produce a smooth flat layer of concrete or similar material.
- (construction, masonry) To use a screed (tool).
- 1999, U.S. Dept. of the Army, Concrete, masonry, and brickwork: a practical handbook, page 131
- The sequence of the operation is: screed, vibrate, then screed again. If forms are in good alignment and firmly supported, and if the concrete has the correct workability, […]