relay

v. place in a horizontal position again; put again, set again; reestablish, set up again

n. shift of workers; electronic regulation device; broadcast, transmission

v. pass on via a series of intermediate stations; pass on; control by an electrical relay; retransmit, rebroadcast

A relay is an electrical switch that opens and closes under the control of another electrical circuit. In the original form, the switch is operated by an electromagnet to open or close one or many sets of contacts. It was invented by Joseph Henry in 1835. Because a relay is able to control an output circuit of higher power than the input circuit, it can be considered, in a broad sense, to be a form of an electrical amplifier.
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Noun
1. the act of relaying something
(hypernym) passage, handing over
2. electrical device such that current flowing through it in one circuit can switch on and off a current in a second circuit
(synonym) electrical relay
(hypernym) electrical device
(part-holonym) circuit, electrical circuit, electric circuit
(part-meronym) electromagnet
Verb
1. pass along; "Please relay the news to the villagers"
(hypernym) communicate, pass on, pass, put across
2. control or operate by relay
(hypernym) operate, control
(derivation) electrical relay

(v. t.)
To lay again; to lay a second time; as, to relay a pavement.
  

(n.)
In various forms of telegraphic apparatus, a magnet which receives the circuit current, and is caused by it to bring into into action the power of a local battery for performing the work of making the record; also, a similar device by which the current in one circuit is made to open or close another circuit in which a current is passing.
  

(n.)
A supply of hunting dogs or horses kept in readiness at certain places to relive the tired dogs or horses, and to continue the pursuit of the game if it comes that way.
  

(n.)
A supply of horses placced at stations to be in readiness to relieve others, so that a trveler may proceed without delay.
  

(n.)
A supply of anything arranged beforehand for affording relief from time to time, or at successive stages; provision for successive relief.
  

(n.)
A number of men who relieve others in carrying on some work.
  

1. To retransmit a received message from one station to another station. 2. An electromechanical or semiconductor switch (i.e., solid-state relay) in which a current or voltage applied across one port or terminal controls electrical currents or voltages that appear across another terminal or terminals. (188 )