Definition of second thought
: reconsideration or a revised opinion of a previous often hurried decision <began to have second thoughts>
Examples of second thought in a sentence
After she agreed to lend him the money, she had second thoughts.
She was having second thoughts about getting married.
He hardly gave it a second thought.
First Known Use of second thought
SECOND THOUGHT Defined for English Language Learners
Definition of second thought for English Language Learners
: a feeling of guilt, doubt, worry, etc., that you have after you have decided to do something or after something has happened
Seen and Heard
What made you want to look up second thought? Please tell us where you read or heard it (including the quote, if possible).