(politics) a provisionannexed to a bill under the consideration of a legislature, having little connection with the subject matter of the bill
(by extension) Something extra or burdensome that is imposed.
A. S. HardyThis question was a rider which Mab found difficult to answer.
an amendment or addition to an entertainer's performance contract, often covering a performer's equipment or food, drinks, and general comfort requirements
A small, sliding piece of aluminium on a chemical balance, used to determine small weights
(UK, archaic) An agent who went out with samples of goods to obtain orders; a commercial traveller.
(obsolete) One who breaks in or manages a horse.
(math) A problem of extra difficulty added to another on an examination paper.
An old Dutch gold coin with the figure of a man on horseback stamped upon it.
J. FletcherHis mouldy money! half a dozen riders.
(mining) Rock material in a vein of ore, dividing it.
(shipbuilding) An interiorrib occasionally fixed in a ship's hold, reaching from the keelson to the beams of the lower deck, to strengthen the frame.
(nautical) The second tier of casks in a vessel's hold.
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.
