Blunder \Blun"der\, n.

1. Confusion; disturbance. [Obs.]

2. A gross error or mistake, resulting from carelessness, stupidity, or culpable ignorance.

Syn: Blunder, Error, Mistake, Bull.

Usage: An error is a departure or deviation from that which is right or correct; as, an error of the press; an error of judgment. A mistake is the interchange or taking of one thing for another, through haste, inadvertence, etc.; as, a careless mistake. A blunder is a mistake or error of a gross kind. It supposes a person to flounder on in his course, from carelessness, ignorance, or stupidity. A bull is a verbal blunder containing a laughable incongruity of ideas.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Blunder \Blun"der\, v. i. [imp. & p. p. Blundered; p. pr. & vb. n. Blundering.]

[OE. blunderen, blondren, to stir, confuse, blunder; perh. allied to blend to mix, to confound by mixture.]

1. To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription. --Swift.

2. To move in an awkward, clumsy manner; to flounder and stumble.

I was never distinguished for address, and have often even blundered in making my bow. --Goldsmith.

Yet knows not how to find the uncertain place, And blunders on, and staggers every pace. --Dryden.

To blunder on.
   (a) To continue blundering.
   (b) To find or reach as if by an accident involving more or less stupidity, -- applied to something desirable; as, to blunder on a useful discovery.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Blunder \Blun"der\, v. t.

1. To cause to blunder. [Obs.]

``To blunder an adversary.'' --Ditton.

2. To do or treat in a blundering manner; to confuse.

He blunders and confounds all these together. --Stillingfleet.

Source: Webster's Revised Unabridged Dictionary (1913)