on second thought

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]

Example Sentences

On second thought, no: that would be like trying to count every pine needle in Yosemite.

From Los Angeles Times

But only two hours after this promise, Linn says the landlord texted to say: "On second thought, I want you to move out."

From BBC

“On second thought, I will make a deal with you.”

From Literature

What began as a flippantly offered pipe dream, on second thought sounded too good to resist.

From New York Times

On second thought: Donald Trump backed down from delivering his own closing argument in his civil fraud trial.

From New York Times