名词

1. 骑师;骑手;骑马(或自行车、摩托车)的人
A rider is someone who rides a horse, a bicycle, or a motorcycle as a hobby or job. You can also refer to someone who is riding a horse, a bicycle, or a motorcycle as a rider.

2. 附文;附件;附加条款
A rider is a statement that is added to another statement, especially one which contains a change, an explanation, or further information.

1. a clause that is appended to a legislative bill

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

Synonym: passenger

3. a traveler who actively rides an animal (as a horse or camel)

4. a traveler who actively rides a vehicle (as a bicycle or motorcycle)