Also found in: Thesaurus.
A stupid person; a dunce.
[Middle English dulte, from past participle of dullen, to dull, from dul, dull; see dull.]
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.