The definition of a duchess is a wife or widow of a duke, or a woman who has the rank of a duke in her own right.
(noun)The wife of a duke is an example of a duchess.
See duchess in Webster's New World College Dictionary
noun
Origin: ME & OFr duchesse, fem. of duc, duke
See duchess in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English duchesse
Origin: , from Old French
Origin: , from Medieval Latin ducissa
Origin: , from Latin dux, duc-, leader; see duke
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