Webster's Revised Unabridged Dictionary · 1913

Mediate

Mediate , adjective

[Latin mediatus, past participle of mediare, transitive verb, to halve, v. i., to be in the middle. See Mid, and compare Moiety.]

1.
Being between the two extremes; middle; interposed; intervening; intermediate. — Prior
2.
Acting by means, or by an intervening cause or instrument; not direct or immediate; acting or suffering through an intervening agent or condition.
3.
Gained or effected by a medium or condition. — Bacon
An act of mediate knowledge is complex. — Sir W. Hamilton

Mediate , intransitive verb

[Late Latin mediatus, past participle of mediare to mediate. See Mediate, a.]

1.
To be in the middle, or between two; to intervene. [Rare]
2.
To interpose between parties, as the equal friend of each, esp. for the purpose of effecting a reconciliation or agreement; as, to mediate between nations.

Mediate , transitive verb

1.
To effect by mediation or interposition; to bring about as a mediator, instrument, or means; as, to mediate a peace.
2.
To divide into two equal parts. [Rare] — Holder