adj.
Marked by or possessing a high degree of sophistication; refined: "Many picnics manage without this sophistication, but we like to be couth and feel that the delicacies of gracious living enhance the chances" (John Gould).
n.
Refinement; sophistication: "The man has no couth" (Los Angeles Times).
[Back-formation from UNCOUTH.]
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.