According to the free dictionary it means the following

me·di·ate (md-t)
v. me·di·at·ed, me·di·at·ing, me·di·ates
v.tr.
1. To resolve or settle (differences) by working with all the conflicting parties: mediate a labor-management dispute.
2. To bring about (a settlement, for example) by working with all the conflicting parties.
3. To effect or convey as an intermediate agent or mechanism.
v.intr.
1. To intervene between two or more disputants in order to bring about an agreement, a settlement, or a compromise.
2. To settle or reconcile differences.
3. To have a relation to two differing persons or things.
adj. (-t)
1. Acting through, involving, or dependent on an intervening agency.
2. Being in a middle position.

Taken from http://www.thefreedictionary.com/mediated

No es un palabra mal. No tiene algo significo doble. Literalmente significa «poner su mismo entre dos cosas», por ejemplo dos personas que estan luchando o disputando. Un disputa entre empleados y su empleador, quizas puede ser «mediated» para un persona neutral quien no esta enojado. 

¡«Media» en «mediated» aqui significa al mismo a en español!

Tambien puede significa otros aspectos de algo cosas entre dos algos. "In a telephone, the transmission of the voice is mediated by an electric current."

I just ran across a good example of actual use:

http://apple.slashdot.org/story/14/01/09/2320245/samsung-apple-agree-to-try-mediation-in-patent-disputes

"Samsung, Apple Agree to Try Mediation in Patent Disputes"

Thank you Comandante...You help me so much...Bye...