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.