One who, or that which, rides. [1913 Webster]
Formerly, an agent who went out with samples of goods to obtain orders; a commercial traveler. [1913 Webster]
One who breaks or manages a horse. Shak. [1913 Webster]
An addition or amendment to a manuscript or other document, which is attached on a separate piece of paper; in legislative practice, an additional clause annexed to a bill while in course of passage; something extra or burdensome that is imposed. [1913 Webster]
"After the third reading, a foolish man stood up to propose a rider." [1913 Webster]

"This [question] was a rider which Mab found difficult to answer." [1913 Webster]
A problem of more than usual difficulty added to another on an examination paper. [1913 Webster]
A Dutch gold coin having the figure of a man on horseback stamped upon it. [1913 Webster]
"His moldy money ! half a dozen riders." [1913 Webster]
Rock material in a vein of ore, dividing it. [1913 Webster]
An interior rib occasionally fixed in a ship's hold, reaching from the keelson to the beams of the lower deck, to strengthen her frame. Totten. [1913 Webster]
The second tier of casks in a vessel's hold. [1913 Webster]
A small forked weight which straddles the beam of a balance, along which it can be moved in the manner of the weight on a steelyard. [1913 Webster]
A robber. Drummond. [1913 Webster]

Rider's bone (Med.), a bony deposit in the muscles of the upper and inner part of the thigh, due to the pressure and irritation caused by the saddle in riding.

top

OXFORD DICTIONARY

Rider, n.
1 a person who rides (esp. a horse).
2 a an additional clause amending or supplementing a document. b Brit. Parl. an addition or amendment to a bill at its third reading. c a corollary. d Brit. a recommendation etc. added to a judicial verdict.
3 Math. a problem arising as a corollary of a theorem etc.
4 a piece in a machine etc. that surmounts or bridges or works on or over others.
5 (in pl.) an additional set of timbers or iron plates strengthening a ship's frame.

Derivative

riderless adj.

Etymology

OE ridere (as RIDE)

top

THESAURUS

Rider

addendum, affix, allonge, appendix, bidet, bill, broncobuster, buckaroo, caballero, calendar, carriage horse, cart horse, cavalier, cavalry horse, cavalryman, chevalier, circus rider, clause, coda, codicil, commentary, companion bills amendment, cowboy, cowgirl, cowpuncher, draft horse, dragnet clause, dray horse, driving horse, enacting clause, enclitic, envoi, epilogue, equestrian, equestrienne, escalator clause, fill horse, filler, gaucho, gigster, hack, hackney, hold-up bill, horse soldier, horseback rider, horsebacker, horseman, horsewoman, hunter, infix, interlineation, interpolation, jockey, joker, jument, knight, lead, leader, marginalia, motion, mount, mounted policeman, note, omnibus bill, pack horse, palfrey, plow horse, pole horse, polo pony, post-horse, postboy, postilion, postscript, prefix, privileged question, proclitic, proviso, puncher, question, remount, riding horse, road horse, roadster, roughrider, rouncy, saddle horse, saddler, saving clause, scholia, shaft horse, stalking-horse, steeplechaser, suffix, sumpter, sumpter horse, supplement, tail, thill horse, thiller, trick rider, vaquero, wheeler, wheelhorse, workhorse

top

ROGET THESAURUS

Rider

Adjunct

N adjunct, addition, additament, additum, affix, appelidage, annexe, annex, augment, augmentation, increment, reinforcement, supernumerary, accessory, item, garnish, sauce, accompaniment, adjective, addendum, complement, supplement, continuation, rider, offshoot, episode, side issue, corollary, piece, flap, lappet, skirt, embroidery, trappings, cortege, tail, suffix, wing, additional, alate, alated, winged, in addition.

Traveler

N traveler, wayfarer, voyager, itinerant, passenger, commuter, tourist, excursionist, explorer, adventurer, mountaineer, hiker, backpacker, Alpine Club, peregrinator, wanderer, rover, straggler, rambler, bird of passage, gadabout, gadling, vagrant, scatterling, landloper, waifs and estrays, wastrel, foundling, loafer, tramp, tramper, vagabond, nomad, Bohemian, gypsy, Arab, Wandering Jew, Hadji, pilgrim, palmer, peripatetic, somnambulist, emigrant, fugitive, refugee, beach comber, booly, globegirdler, globetrotter, vagrant, hobo, night walker, sleep walker, noctambulist, runabout, straphanger, swagman, swagsman, trecker, trekker, zingano, zingaro, runner, courier, Mercury, Iris, Ariel, comet, pedestrian, walker, foot passenger, cyclist, wheelman, rider, horseman, equestrian, cavalier, jockey, roughrider, trainer, breaker, driver, coachman, whip, Jehu, charioteer, postilion, postboy, carter, wagoner, drayman, cabman, cabdriver, voiturier, vetturino, condottiere, engine driver, stoker, fireman, guard, chauffeur, conductor, engineer, gharry-wallah, gari-wala, hackman, syce, truckman, on the road.

For further exploring for "Rider" in Webster Dictionary Online