BLUN'DER, verb intransitive [This word seems to be allied to the Gr., to err, and to flounder. The sense of the latter is to move with sudden jerks, and irregular motions.]
1. To mistake grossly; to err widely or stupidly.
2. To move without direction, or steady guidance; to plunge at an object; to move, speak or write with sudden and blind precipitance; as, to blunder upon a reason; to blunder round a meaning.
3. To stumble, as a horse; a common use of the word.
BLUN'DER, noun A mistake through precipitance, or without due exercise of judgment; a gross mistake.