What is the meaning of Rider?

A mounted person.

A knight, or other mounted warrior.
An old Dutch gold coin with the figure of a man on horseback stamped upon it.
Someone who rides a horse or (later) a bicycle, motorcycle etc.
A mounted robber; a bandit, especially in the Scottish borders.
Someone who breaks in or manages a horse; a riding master.
An agent who goes out with samples of goods to obtain orders; a commercial traveller or travelling salesman.
Someone riding in a vehicle; a passenger on public transport.

A knight, or other mounted warrior.

An old Dutch gold coin with the figure of a man on horseback stamped upon it.

Someone who rides a horse or (later) a bicycle, motorcycle etc.

A mounted robber; a bandit, especially in the Scottish borders.

Someone who breaks in or manages a horse; a riding master.

An agent who goes out with samples of goods to obtain orders; a commercial traveller or travelling salesman.

Someone riding in a vehicle; a passenger on public transport.

An addition, supplement.

A supplementary clause added to a document after drafting, especially to a bill under the consideration of a legislature.
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 matter or question arising in corollary; a qualification.
A supplementary question, now especially in mathematics.
An add-on to an insurance policy.

A supplementary clause added to a document after drafting, especially to a bill under the consideration of a legislature.

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 matter or question arising in corollary; a qualification.

A supplementary question, now especially in mathematics.

An add-on to an insurance policy.

Technical senses.

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.
Rock material in a vein of ore, dividing it.
The second tier of casks in a vessel's hold.
A small, sliding piece of thin metal on a balance, used to determine small weights.
The first Lenormand card, also known as either the horseman or the cavalier.
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.