Meaning of RIDER in English

RIDER

/ ˈraɪdə(r); NAmE / noun

1.

a person who rides a horse, bicycle or motorcycle :

Three riders (= people riding horses) were approaching.

horses and their riders

She's an experienced rider.

a motorcycle dispatch rider

—picture at showjumping

2.

rider (to sth) an extra piece of information that is added to an official document

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WORD ORIGIN

late Old English rīdere mounted warrior, knight (see ride , -er ).

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.