mediation

n. arbitration; intervention; reconciliation; act of mediating between two parties; act of bringing peace between two nations who are at dispute (International Law)

Mediation, a form of alternative dispute resolution (ADR), aims to assist two (or more) disputants in reaching an agreement. Whether an agreement results or not, and whatever the content of that agreement, if any, the  parties themselves determine, rather than accepting something imposed by a third party. The disputes may involve states, organizations, communities, individuals or other representatives with a vested interest in the outcome.
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Mediate /me·di·ate/ indirect; accomplished by means of an intervening medium. mediate /me·di·ate/ to serve as an intermediate agent. me·di·ate v. [more]Mediation - Community and Resources

Noun
1. negotiation to resolve differences conducted by some impartial party
(hypernym) negotiation, dialogue, talks
(hyponym) arbitration
(derivation) intercede, mediate, intermediate, liaise, arbitrate
2. the act of mediating
(synonym) intermediation
(hypernym) intervention, intercession
(derivation) intercede, mediate, intermediate, liaise, arbitrate

n. mediation, arbitration; act of mediating between two parties; act of bringing peace between two nations who are at dispute (International Law)