1. (v. i.) To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription.

2. (v. i.) To move in an awkward, clumsy manner; to flounder and stumble.

3. (v. t.) To cause to blunder.

4. (v. t.) To do or treat in a blundering manner; to confuse.

5. (n.) Confusion; disturbance.

6. (n.) A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.

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