Definition of "Relay" :
noun: the act of passing something along from one person or group to another
"The relay was successful."
noun: electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit
noun: a race between teams; each member runs or swims part of the distance
noun: a fresh team to relieve weary draft animals
noun: a crew of workers who relieve another crew
verb: pass along
"Please relay the news to the villagers."
verb: control or operate by relay