from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A dunce.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A stupid person; a dunce
from the GNU version of the Collaborative International Dictionary of English
- n. A dunce; a numskull; a blockhead.
from The Century Dictionary and Cyclopedia
- n. A dunce; a numskull.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a stupid person; these words are used to express a low opinion of someone's intelligence
Perhaps Dutch donder, thunder (from Middle Dutch doner; see (s)tenə- in Indo-European roots) + head.(American Heritage® Dictionary of the English Language, Fourth Edition)