relay

¹ American  

[ree-ley, ree-ley, ri-ley] / ˈri leɪ, ˈri leɪ, rɪˈleɪ /

noun

1. a series of persons relieving one another or taking turns; shift.

2. a fresh set of dogs or horses posted in readiness for use in a hunt, on a journey, etc.

3. Sports.

   1. relay race.

   2. a length or leg in a relay race.

4. Machinery. an automatic control device in which the settings of valves, switches, etc., are regulated by a powered element, as a motor, solenoid, or pneumatic mechanism actuated by a smaller, sensitive element.

5. Electricity. a device, usually consisting of an electromagnet and an armature, by which a change of current or voltage in one circuit is used to make or break a connection in another circuit or to affect the operation of other devices in the same or another circuit.

6. (initial capital letter) one of an early series of experimental low-altitude, active communications satellites.

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verb (used with object)

relayed, relaying

1. to carry forward by or as if by relays.

   to relay a message.

2. to provide with or replace by fresh relays.

3. Electricity. to retransmit (a signal, message, etc.) by or as if by means of a telegraphic relay.

verb (used without object)

relayed, relaying

1. Electricity. to retransmit a signal or message electronically.

relay ² American  

[ree-ley] / riˈleɪ /

verb (used with object)

relaid, relaying

1. re-lay.

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relay British  

noun

1. a person or team of people relieving others, as on a shift

2. a fresh team of horses, dogs, etc, posted at intervals along a route to relieve others

3. the act of relaying or process of being relayed

4. 1. short for relay race

   2. one of the sections of a relay race

5. an automatic device that controls the setting of a valve, switch, etc, by means of an electric motor, solenoid, or pneumatic mechanism

6. electronics an electrical device in which a small change in current or voltage controls the switching on or off of circuits or other devices

7. radio

   1. a combination of a receiver and transmitter designed to receive radio signals and retransmit them, in order to extend their range

   2. ( as modifier )

      a relay station

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verb

1. to carry or spread (something, such as news or information) by relays

2. to supply or replace with relays

3. to retransmit (a signal) by means of a relay

4. to broadcast (a performance) by sending out signals through a transmitting station

   this concert is being relayed from the Albert Hall

relay Scientific  

/ rē′lā /

1. An electrical switch that is operated by an electromagnet, such as a solenoid. When a small current passes through the electromagnet's coiled wire, it produces a magnetic field that attracts a movable iron bar, causing it to pivot and open or close the switch.

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Etymology

Origin of relay

First recorded in 1375–1425; (for the verb) late Middle English relaien “to unleash fresh hounds in a hunt,” from Middle French relaier, Old French: “to leave behind, release,” from re- re- + laier “to leave” (dialectal variant of laissier, from Latin laxāre; relax ); (for the noun) late Middle English relai “set of fresh hounds,” from Middle French, derivative of relaier

Example Sentences

Notre Dame won the 4x100 relay in 40.80.

From Los Angeles Times • Mar. 31, 2026

Gemili reached the semi-finals of the 100m in London and went on to win relay medals at three World Championships.

From BBC • Mar. 30, 2026

This process can be compared to a relay, where energy is passed from one particle to another.

From Science Daily • Mar. 28, 2026

"We're in a relay race, and we're not successful until the next missions are successful."

From Barron's • Mar. 27, 2026

This highly classified space vehicle could take razor-sharp images and relay them via an electronic signal directly to the Central Intelligence Agency.

From "Spies: The Secret Showdown Between America and Russia" by Marc Favreau

Related Words

• broadcast
• carry
• communicate
• deliver
• hand over
• send
• turn over