Blunder means to say or do something in a careless or stupid way.(verb)
An example of blunder is someone tripping over their own foot.
The definition of a blunder is a foolish mistake.(noun)
An example of blunder is someone referring to a man's wife as his daughter.
See blunder in Webster's New World College Dictionary
Origin: ME blunderen, freq. < ON blunda, to shut the eyes, akin to Swed dial. blundra, to do blindly < IE base *bhlendh-: see blend
See blunder in American Heritage Dictionary 4
Origin: From Middle English blunderen, to go blindly
Origin: , perhaps from Old Swedish blundra, have one's eyes closed
Origin: , from Old Norse blunda.
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