English to English

noun (n)

• the action of interjecting or interposing an action or remark that interrupts(noun.act)

  Synonym:
  interjection, interpellation, interpolation
  

  source: wordnet30
• the act or fact of interposing one thing between or among others(noun.act)

  Synonym:
  intervention
  

  source: wordnet30
• The act of interposing, or the state of being interposed; a being, placing, or coming between; mediation.(noun)

  source: webster1913