Definition of step change noun from the Oxford Advanced Learner's Dictionary


step change

BrE BrE//ˈstep tʃeɪndʒ//
; NAmE NAmE//ˈstep tʃeɪndʒ//
[usually singular] (British English)
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a big change or improvement in something His speech called for a step change in attitudes to the environment in the 21st century.