• WordNet 3.6
    • n dunderhead a stupid person; these words are used to express a low opinion of someone's intelligence
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Webster's Revised Unabridged Dictionary
    • n Dunderhead A dunce; a numskull; a blockhead.
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Century Dictionary and Cyclopedia
    • n dunderhead A dunce; a numskull.
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Chambers's Twentieth Century Dictionary
    • n Dunderhead dun′dėr-hed a stupid person—also Dun′derpate
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Webster's Revised Unabridged Dictionary
Prov. Eng. also dunderpoll, from dunder, same as thunder,


In literature:

I never saw such a dunderhead; can't you understand anything at all?
"A Connecticut Yankee in King Arthur's Court, Complete" by Mark Twain (Samuel Clemens)
And let me tell you, you dunderhead," he added to James, "this will cost you your position.
"Swept Out to Sea" by W. Bertram Foster
So off he marched boldly toward castle Dunderhead.
"St. Nicholas Magazine for Boys and Girls, V. 5, April 1878" by Various
What did I tell them, the duffers and dunderheads?
"Greener Than You Think" by Ward Moore
And Dickie Blue was a dunderhead.
"Harbor Tales Down North" by Norman Duncan
Lady Allie is either dunderheaded or designing.
"The Prairie Mother" by Arthur Stringer
Poor old fellow's a dunderhead.
"The Side Of The Angels" by Basil King
A fine pair of dunderheads, he and Scotty were.
"The Flying Stingaree" by Harold Leland Goodwin
If she hadn't married that dunderhead she'd have been a happy woman.
"The Squire's Daughter" by Archibald Marshall
It was plain that Artemisia would develop into one of those women who waste no time over dunderheads.
"Captain Macedoine's Daughter" by William McFee

In news:

The more that dunderheads like me write about him, the more attention he gets, the more people tune in to find out what the fuss is all about, the more money Rush can charge advertisers, the fatter his pockets grow, the happier he gets.
View full size Steve Cowden/The Oregonian So, some dunderhead in an orange sports car decides to share his midlife crisis with you on Interstate 5, speeding in and out of lanes without signaling, cutting you off and nearly causing a crash.
His blog Pragmatic Economics tries to explain complicated financial principals to average dunderheads.
So it has been awhile since I blogged about my neighbors the Dunderheads and their yapping, 24/7 dogs.