/ ˌdʒeɪn ˈdəʊ; NAmE ˈdoʊ/ noun [ sing. ] ( NAmE )
1.
used to refer to a woman whose name is not known or is kept secret, especially in a court of law
2.
an average woman
—compare John Doe
For more information see the Cultural Guide
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WORD ORIGIN
mid 19th cent.: the female equivalent of John Doe .