[ rahy-zer ]

  1. a person who rises, especially from bed: to be an early riser.

  2. the vertical face of a stair step.

  1. 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.

  2. a vertical pipe, duct, or conduit.

  3. Metallurgy. a chamber or enlarged opening at the top of a mold for allowing air to escape or adding extra metal.

  4. Nautical.

    • a heavy strake of planking in the vicinity of the garboard strake in a wooden vessel.

Origin of riser

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

Words Nearby riser

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use riser in a sentence

British Dictionary definitions for riser


/ (ˈraɪzə) /

  1. a person who rises, esp from bed: an early riser

  2. the vertical part of a stair or step

  1. 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