d'or·say \(ˈ)dȯr|sā, -|zā\noun ord'orsay pump Usage: often capitalized D&O Etymology: after Count Alfred G.G. d'Orsay died 1852 French society leader and arbiter of fashion : a pump-type shoe or slipper made with a circular vamp and a quarter that curves to meet the vamp at the shank line