D defs.my
Entry 2 senses Webster, 1913

Mediation

/mēdˌ-ē-āsh'-ən/ · Me·di·a·tion · IPA /ˌmidiˈeɪʃən/
01 n. The act of mediating; action or relation of anything interposed; action as a necessary condition, means, or instrument; interposition; inte…
  1. 1.
    The act of mediating; action or relation of anything interposed; action as a necessary condition, means, or instrument; interposition; intervention.
    “The soul [acts] by the mediation of these passions.” South.
  2. 2.
    Hence, specifically, agency between parties at variance, with a view to reconcile them; entreaty for another; intercession.