Definitions
1.nounA clumsy or embarrassing mistake.
2.nounA very bad move, usually caused by some tactical oversight.
3.verbTo make a clumsy or stupid mistake."to blunder in preparing a medical prescription"
4.verbTo move blindly or clumsily.
5.verbTo cause to make a mistake.
6.verbTo do or treat in a blundering manner; to confuse.