a second thought(redirected from second thought)
Also found in: Dictionary, Thesaurus, Wikipedia.
a second thought
A pause for a second or further consideration; a hesitation or concern about (doing) something. It isn't worth a second thought at this stage. When we were kids, we never gave a second thought about whether this food or that was good for us—we tried to eat what tasted good, and tried to avoid what tasted bad.