One who mediates; especially, one who interposes between parties at variance for the purpose of reconciling them; hence, an intercessor.

A neutral party who listens to all sides and then offers a solution to a conflict.

A neutral third party who helps to resolve disputes between employers and employees during mediation. A mediator typically does not issue a final decision, but rather facilitates negotiations among the opposing parties. Agreements reached among the parties are typically not legally binding, but rather depend on honesty and integrity to uphold them. Compare to Arbitrator.

A substance or structure that helps bring about a specific response in a bodily tissue.