Definition of sliding scale noun from the Oxford Advanced Learner's Dictionary


sliding scale

BrE BrE//ˌslaɪdɪŋ ˈskeɪl//
; NAmE NAmE//ˌslaɪdɪŋ ˈskeɪl//
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a system in which the rate at which something is paid varies according to particular conditions Fees are calculated on a sliding scale according to income (= richer people pay more).
See the Oxford Advanced American Dictionary entry: sliding scale