Source : Webster's Revised Unabridged Dictionary (1913)

Interlocution \In`ter*lo*cu"tion\, n. [L. interlocutio, from
   interloqui, interlocutus, to speak between; inter between +
   loqui to speak: cf. F. interlocution. See {Loquacious}.]
   1. Interchange of speech; dialogue; conversation; conference.

   2. (Law) An intermediate act or decree before final decision.
      --Ayliffe.

   3. Hence, intermediate argument or discussion.