Also found in: Thesaurus.


A mistake typically caused by ignorance or carelessness.
v. blun·dered, blun·der·ing, blun·ders
1. To make a mistake.
2. To move clumsily or haltingly.
1. To make a mistake in; botch: would-be thieves blundering a break-in.
2. To utter (something) stupidly or thoughtlessly.

[From Middle English blunderen, to go blindly, perhaps from Old Swedish blundra, have one's eyes closed, from Old Norse blunda.]

blun′der·er n.
blun′der·ing·ly adv.
Synonyms: blunder, bumble1, flounder1, lumber2, lurch1, stagger, stumble, totter
These verbs mean to move awkwardly or unsteadily: blundered about the dark room; bumbled in the door and knocked over a chair; floundered up the muddy path; an elephant lumbering along a trail; twisted her ankle and lurched home; staggered under the heavy weight; stumbled down the hall in a stupor; tottered across the finish line in exhaustion.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in classic literature ?
Michel had blunderingly opened the tap of the apparatus to the full.
He hesitated, awkward and bashful, shifted his weight from one leg to the other, then blunderingly gripped my hand in a hearty shake.
"I can't help feeling," I continued blunderingly; "that we've rather left her out of the possible suspects, simply on the strength of her having been away from the place.
Another shareholder called on new chairman Martin Scicluna to axe Mr Coupe, for delivering a "blunderingly poor performance".
(38) In 1880, the Auckland Star's 'Afternoon at the Kawau' reported, blunderingly, that the 'secret treaty' was signed by Thurloe and Meadows, but added the compensatory nugget of information that, though of 'extraordinary historic importance', the document was so secret that 'even Mr Carlyle' had no knowledge of it until alerted by Grey, but 'he felt too old now to re-write his book, but he hoped that the correction would be made in future editions'.
But there these ecclesiastical eminences are erring and erring very blunderingly at that.