noun
A scale or system in which different rates or prices are set according to a particular variable, such as income or level of need.
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The clinic offers a payment plan based on a sliding scale depending on income.
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The gym membership fees are on a sliding scale, so you pay according to how often you go.
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My boss said my bonus would be on a sliding scale depending on how well the project goes.
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The success of the marketing campaign will be on a sliding scale, determined by the number of leads generated.