duke
/dju:k; ?@ du:k; duk/ n (in titles 称谓中作 Duke) (fem 阴性作 duchess / ˈdʌtʃɪs; `dʌtʃɪs/)
1 (title of a) nobleman of the highest rank 公爵（的称号）
the Duke and Duchess of Gloucester 格洛斯特公爵及公爵夫人.
2 (in some parts of Europe, esp formerly) male ruler of a small independent state （欧洲某些地区, 尤指旧时）（独立的小国或公国的）君主.