rider

Definitions of rider in various dictionaries:

noun - a traveler who actively rides an animal (as a horse or camel)

noun - a clause that is appended to a legislative bill

noun - a traveler who actively rides a vehicle (as a bicycle or motorcycle)

noun - a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it

One that rides, especially one who rides horses.

A clause, usually having little relevance to the main issue, that is added to a legislative bill.

An amendment or addition to a document or record.

Something, such as the top rail of a fence, that rests on or is supported by something else.

verb - to sit on, control, and be conveyed by an animal or machine