1. an anonymous, average man.
2. a fictitious name used in legal proceedings for a male party whose true name is not known. Cf. Jane Doe, Richard Roe. 3. of or for an unknown person; using the name John Doe to stand for an unknown person: The judge issued a John Doe warrant so the police could arrest the culprit when they identified him. 4. an unidentified man: The police were looking for a John Doe.