Blun·der v. i. [imp. & p. p. Blundered p. pr. & vb. n. Blundering.]
 1. To make a gross error or mistake; as, to blunder in writing or preparing a medical prescription.
 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.