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English definition of “second thought”

second thought

noun [C]    /ˈsek·ənd ˈθɔt, ˌθɔt/
a change in a decision or opinion: He apparently had second thoughts about that remark. On second thought (= after thinking about it further), I would like a glass of water.
(Definition of second thought noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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