the GNU version of the Collaborative International Dictionary of English
adj. Not thoroughly bred; ill-bred.
The Century Dictionary and Cyclopedia
Of inferior breeding or manners; vulgar. Not pure-bred or -blooded: as, an underbred horse.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. (of persons) lacking in refinement or grace
adj. of inferior or mixed breed
Word Usage
"'I know it is wrong and it is cruel, and it is worse than wrong and cruel, it is what you English call underbred, to be so individually disagreeable, but this grievance of mine has been weighing very heavily on my heart, and"