Definition of "rider"
noun:
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One who rides, often a horse or motorcycle.
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A provision annexed to a bill under the consideration of a legislature, having little connection with the subject matter of the bill.
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An amendment or addition to an entertainer's performance contract, often covering a performer's equipment or food, drinks, and general comfort requirements.
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A small, sliding piece of aluminium on a chemical balance, used to determine small weights.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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