n.
An extremely conventional or priggish person.
[After Mrs. Grundy, character alluded to in the play Speed the Plough by Thomas Morton (1764-1838), British playwright.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
