a representative who acts on behalf of other persons or organizations

an operative serving as a penetration into an intelligence target

a secret agent who incites suspected persons to commit illegal acts

an operative who acts as a courier or go-between from a case officer to a secret agent in a hostile area

an operative who also serves as an official staffer of an intelligence service

a secret agent who was one of the Navajos who devised and used a code based on their native language; the code was unbroken by the Japanese during World War II