rider
n. countable A2 Elementary US //ˈɹaɪdɝ// UK //ɹˈaɪdɐ// rid·er
n. a person who travels on or controls something like a horse, a bicycle, or a motorcycle.
n. a person who travels on or controls a horse, bicycle, or motorcycle; also refers to an additional clause or amendment attached to a legislative bill or legal document.
The rider wore a helmet for safety.
The professional rider spent hours every morning training her horse for the upcoming jumping competition.
While the primary bill focused on infrastructure spending, a controversial rider concerning environmental regulations was added at the last minute to secure the necessary votes.
Usage
In a legal or political context, it refers to an added provision that often has little connection to the main subject of the document.