We found one dictionary that defines the word a second thought:

General (1 matching dictionary)

1. a second thought: Oxford Learner's Dictionaries

Phrases: without a second thought, more... ▸ Words similar to a second thought ▸ Usage examples for a second thought ▸ Idioms related to a second thought ▸ Wikipedia articles (New!) ▸ Words that often appear near a second thought ▸ Rhymes of a second thought ▸ Invented words related to a second thought