riser

[ rahy-zer ]
/ ˈraɪ zər /

noun

a person who rises, especially from bed: to be an early riser.
the vertical face of a stair step.
any of a group of long boards or narrow platforms that can be combined in stepwise fashion: The choir stood on a horseshoe of risers behind the orchestra.
a vertical pipe, duct, or conduit.
Metallurgy. a chamber or enlarged opening at the top of a mold for allowing air to escape or adding extra metal.
Nautical.
  1. a heavy strake of planking in the vicinity of the garboard strake in a wooden vessel.
  2. rising(def 10).

Origin of riser

Middle English word dating back to 1350–1400; see origin at rise, -er1

Words nearby riser

rise through the ranks, rise to, rise to the bait, rise to the occasion, risen, riser, rishi, risibility, risible, rising, rising action

Example sentences from the Web for riser

British Dictionary definitions for riser

riser
/ (ˈraɪzə) /

noun

a person who rises, esp from bed an early riser
the vertical part of a stair or step
a vertical pipe, esp one within a building