interposition

interposition
    n 1: the action of interjecting or interposing an action or
         remark that interrupts [syn: {interjection},
         {interposition}, {interpolation}, {interpellation}]
    2: the act or fact of interposing one thing between or among
       others [syn: {interposition}, {intervention}]
    

Interposition \In`ter*po*si"tion\ (?; 277), n. [L. interpositio
   a putting between, insertion, fr. interponere, interpositum:
   cf. F. interposition. See {Interpone}, {Position}.]
   [1913 Webster]
   1. The act of interposing, or the state of being interposed;
      a being, placing, or coming between; mediation.
      [1913 Webster]

   2. The thing interposed.
      [1913 Webster]
    

31 Moby Thesaurus words for "interposition":
      encroachment, entrance, entrenchment, impingement, imposition,
      incursion, infiltration, influx, infringement, injection, inroad,
      insinuation, interagency, intercession, interference, interjection,
      interloping, intermediation, interposure, interruption,
      intervention, intrusion, invasion, involvement, irruption,
      mediation, obtrusion, stepping in, trespass, trespassing,
      unlawful entry