on second thought

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Idioms and Phrases

Resulting from a revised opinion or change of mind, as in I thought I'd go to the movies, but on second thought I'd rather stay home . Similarly, have second thoughts means “change one's mind,” as in I've had second thoughts about moving to Florida . This idiom alludes to ideas that come later. [Mid-1600s]

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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