A woman or girl whose identity is disguised or concealed: The reporters, Jill and Jane, were two incognitas for their local newspaper when they went to try out the new restaurant that had just opened.

Not known, unknown.

1. With one's name, character and rank, etc., concealed.

2. Status of a person who appears or travels without disclosing his/her true identity.

This term is better known in the Italian version, perhaps via French; as, incognito, from the Latin form shown above.

1. An unknown land; an unexplored region: Before people existed, the world had only terrae incognitae.
2. A new or unexplored field of knowledge: The expression terra incognita is often used in referring to matters about which one is uninformed, e.g. "I don't think I can do this because it is terra incognita to me."