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[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
1350-1400; Middle English; see rise, -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for riser
Contemporary Examples
Historical Examples
  • I am very glad, my precious Agnes, that you have become so early a riser.

    Recollections and Letters of General Robert E. Lee (His Son) Captain Robert E. Lee
  • Perhaps they had by now secured a riser which would bring them up.

    Plague Ship Andre Norton
  • After removing the mould, drill through the metal left in the riser and gates and knock these sections off.

  • At the roof the 40-inch riser is run into a 48-inch stand pipe.

  • How sober, how sparing in diet, how early a riser, how little expensive he must have been!'

    Advice to Young Men William Cobbett
  • He didn't have long to wait, for Tommy is quite as early a riser as Happy Jack.

    Happy Jack Thornton Burgess
  • Dane reached the shaft of the riser—to find the platform gone.

    Plague Ship Andre Norton
  • Notice metal left above weld, where it flowed up into the riser.

British Dictionary definitions for riser


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
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
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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
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