Definition of "second thought" []

• A reconsideration of a decision or opinion previously made. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "I never for a second thought anything as banal as that I was the tenor or the baritone and Donnacha was the other singer in the duet."
• "While at Windermere he paused for a moment in front of Harriet Martineau's cottage, but on second thought he concluded to leave the good deaf lady in peace."
• "These views are so obvious that I am sure they would have required but a second thought to reconcile the reviewer to their location under the head of Pure Mathematics."