Rider meaning : One who rides, often on a horse or a motorcycle. A provision annexed 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. An amendment or addition to an entertainer's performance contract, often covering a performer's equipment or food, drinks, and general comfort requirements. An additional benefit attached to an insurance contract. A small, sliding piece of aluminium on a chemical balance, used to determine small weights. An agent who goes out with samples of goods to obtain orders; a commercial traveller. One who breaks in or manages a horse. The first Lenormand card, also known as either the horseman or the cavalier. 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. Rock material in a vein of ore, dividing it. An interior rib occasionally fixed in a ship's hold, reaching from the keelson to the beams of the lower deck, to strengthen the frame. 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. A robber. A piece, such as the rook or bishop, which moves any distance in one direction, as long as no other piece is in the way.