Definition of "blunder"

blunder

/ˈblʌn.də(ɹ)/

noun
plural blunders
1. A clumsy or embarrassing mistake.
2. (chess) A very bad move, usually caused by some tactical oversight.
verb
third-person singular simple present blunders, present participle blundering, simple past and past participle blundered
1. (intransitive) To make a clumsy or stupid mistake.
2. (intransitive) To move blindly or clumsily.
  Quotations
  I was never distinguished for address, and have often even blundered in making my bow.
  October 6, 1759, Oliver Goldsmith, The Bee No. 1
  blunders on, and staggers every pace
  1700, [John] Dryden, “Palamon and Arcite: Or, The Knight’s Tale. In Three Books.”, in Fables Ancient and Modern; […], London: […] Jacob Tonson, […]
3. (transitive) To cause to make a mistake.
  Quotations
  To blunder an adversary.
  1714, Humphry Ditton, A discourse concerning the resurrection of Jesus Christ
4. (transitive) To do or treat in a blundering manner; to confuse.
  Quotations
  He blunders and confounds all these together.
  1676, Edward Stillingfleet, A Defence of the Discourse Concerning the Idolatry Practised in the Church of Rome