interlocutor

noun4

1. •
   A person who takes part in dialogue or conversation: a locutive partner.

   • Explanations which continually remind one's interlocutor of one's ignorance are a great damper upon the easy flow of talk. — 1894
2. •
   A man in the middle of the line in a minstrel show who questions the endmen and acts as leader.

   • The "interlocutor" greeted the audience and engaged in comical repartee with the "end men," named Tambo and Bones. — 1991
3. •
   An interlocutory judgement or sentence.
4. •
   A decree of a court.

   • A decree of the English Court of Chancery is not entitled to more respect in Scotland than a decree (interlocutor) of the Scottish Court of Session in England. — 1869