Definition of sea change in US English:

sea change


  • A profound or notable transformation.

    • ‘This marks a profound sea change for the Company, which is arguably the largest B-to-B publisher online.’
    • ‘With every decision that marks a sea change on the telecom horizon, there's usually a technology solution to address it.’
    • ‘Only a true partnership involving all stakeholders can make a real sea change.’
    transformation, change, alteration, modification, variation, conversion, revision, amendment, metamorphosis, transfiguration, evolution, mutation
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From Shakespeare's Tempest (I. ii. 403).


sea change

/ˈsi ˌtʃeɪndʒ//ˈsē ˌCHānj/