[ rahy-zer ]
/ ˈraɪ zər /


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.
  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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for riser

British Dictionary definitions for riser


/ (ˈraɪzə) /


a person who rises, esp from bedan early riser
the vertical part of a stair or step
a vertical pipe, esp one within a building
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for riser



late 14c., "rebel," agent noun from rise (v.). Meaning "one who rises" (from bed, in a certain manner) is mid-15c. Meaning "upright part of a step" is from 1771.

Online Etymology Dictionary, © 2010 Douglas Harper