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[rahy-der] /ˈraɪ dər/
a person who rides a horse or other animal, a bicycle, etc.
something that rides.
an additional clause, usually unrelated to the main body, attached to a legislative bill in passing it.
an addition or amendment to a document, testament, etc.
any object or device that straddles, is mounted upon, or is attached to something else.
a rail or stake used to brace the corners in a snake fence.
Shipbuilding. any of various members following and reinforcing primary framing members, especially a plate or timber running along the top of a keel.
  1. a former gold coin of Scotland, first issued by James III in 1475, whose obverse bears an equestrian figure of the king.
  2. any of several gold or silver coins of the Netherlands bearing the figure of a horseman.
Origin of rider
before 1100; Middle English ridere, Old English. See ride, -er1
Related forms
riderless, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for rider
Contemporary Examples
Historical Examples
  • Crane remembered his own suspicion as to Lucretia's rider, but he only said, "Well?"

    Thoroughbreds W. A. Fraser
  • All at once he remembered that the face of Lauzanne's rider had a dream-like familiarity.

    Thoroughbreds W. A. Fraser
  • A "bronch fighter" is not more jealous of his sweetheart than of his reputation as a rider.

    Chip, of the Flying U B. M. Bower
  • The industry and movements of the rider were not less remarkable than those of the ridden.

    The Last of the Mohicans James Fenimore Cooper
  • In an instant horse and rider were spinning around like a top.

British Dictionary definitions for rider


a person or thing that rides, esp a person who rides a horse, a bicycle, or a motorcycle
an additional clause, amendment, or stipulation added to a legal or other document, esp (in Britain) a legislative bill at its third reading
(Brit) a statement made by a jury in addition to its verdict, such as a recommendation for mercy
any of various objects or devices resting on, surmounting, or strengthening something else
a small weight that can be slid along one arm of a chemical balance to make fine adjustments during weighing
(geology) a thin seam, esp of coal or mineral ore, overlying a thicker seam
Derived Forms
riderless, adjective
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 rider

"one who rides," Old English ridere "rider, trooper, knight, mounted warrior," agent noun from ride (v.). Meaning "clause tacked on to a document after first draft" is from 1660s. Related: Riderless.

Online Etymology Dictionary, © 2010 Douglas Harper
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rider in Culture

rider definition

A provision, usually controversial and unlikely to pass on its own merits, that is attached to a popular bill in the hopes that it will “ride” to passage on the back of the popular bill.

The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang definitions & phrases for rider
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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