noun Jean Bap·tiste Do·na·tien de Vi·meur [zhahn ba-teest daw-na-syan duh vee-mœr] /ʒɑ̃ baˈtist dɔ naˈsyɛ̃ də viˈmœr/, Count de,1725–1807, French general: marshal of France 1791–1807; commander of the French army in the American Revolution.