ˈstep change noun [singular] British EnglishBrE a big and important change in an organization or in society 〔机构或社会中的〕重大改革，重大变革step change in The new law marks a step change in our programme for reforming public services. 这条新法规标志着我们公共事业改革方案中的重大转变。
step change• The White Paper marks a step change in our programme for reforming the public sector.