- 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.
- a heavy strake of planking in the vicinity of the garboard strake in a wooden vessel.
- rising(def 10).
Origin of riser
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for riser
Protruding metal is that which flowed up into gate and riser.The Boy's Book of New Inventions
Harry E. Maule
Dane reached the shaft of the riser—to find the platform gone.
Perhaps they had by now secured a riser which would bring them up.
At the roof the 40-inch riser is run into a 48-inch stand pipe.The New York Subway
He didn't have long to wait, for Tommy is quite as early a riser as Happy Jack.Happy Jack
- 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