Charles Cornwallis char·les·corn·wallis uncommon noun 1. commander of the British forces in the American War of Independence; was defeated by American and French troops at Yorktown (1738-1805) SynonymsCornwallisCharles CornwallisFirst Marquess Cornwallis Related words Broader terms peergeneral WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.