Pronunciation: (blun'dur), [key]
a gross, stupid, or careless mistake: That's your second blunder this morning.
1. to move or act blindly, stupidly, or without direction or steady guidance: Without my glasses I blundered into the wrong room.
2. to make a gross or stupid mistake, esp. through carelessness or mental confusion: Just pray that he doesn't blunder again and get the names wrong.
1. to bungle; botch: Several of the accounts were blundered by that new assistant.
2. to utter thoughtlessly; blurt out: He blundered his surprise at their winning the award.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.