Rid"er (rīd"ẽr), n.
1. One who, or that which, rides.
2. Formerly, an agent who went out with
samples of goods to obtain orders; a commercial traveler.
[Eng.]
3. One who breaks or manages a horse.
Shak.
4. 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.
After the third reading, a foolish man stood up to
propose a rider.
Macaulay.
This [question] was a rider which Mab found
difficult to answer.
A. S. Hardy.
5. (Math.) A problem of more than usual
difficulty added to another on an examination paper.
6. [D. rijder.] A Dutch gold coin
having the figure of a man on horseback stamped upon it.
His moldy money ! half a dozen
riders.
J. Fletcher.
7. (Mining) Rock material in a vein of
ore, dividing it.
8. (Shipbuilding) 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.
9. (Naut.) The second tier of casks in
a vessel's hold.
10. 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.
11. A robber. [Obs. or Prov. Eng.]
Drummond.
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.