Dictionary

second thought

noun

: a feeling of guilt, doubt, worry, etc., that you have after you have decided to do something or after something has happened

Full Definition of SECOND THOUGHT

:  reconsideration or a revised opinion of a previous often hurried decision <began to have second thoughts>

Examples of SECOND THOUGHT

  1. After she agreed to lend him the money, she had second thoughts.
  2. She was having second thoughts about getting married.
  3. He hardly gave it a second thought.

First Known Use of SECOND THOUGHT

1622

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