On second thought
Example: On second thought, I will join you for dinner tonight.
Definition
"On second thought" is an expression used to indicate that someone has reconsidered or changed their initial opinion or decision after reflecting further. It often introduces a revision or reversal of a previous statement or plan.
Etymology
The phrase "on second thought" originates from the idea of taking a second moment to think about something more carefully after the first impression. It reflects the natural human tendency to reconsider initial judgments, and has been in use since at least the 19th century as a way to signal a change of mind.
Learn to use this expression actively
"On second thought" appears in the Vocaplus list "English - General - Idioms and Proverbs - (C1) - set 1", containing 130 commonly used expressions.
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