relay
n. countable B1 Intermediate US //ˈɹiˌɫeɪ// re·lay
n. a race where team members take turns running or swimming parts of the total distance. It also means a device that passes an electrical signal from one circuit to another.
n. a race between teams in which each member completes a specific portion of the course; also, an electrical switch that opens and closes under the control of another circuit.
She ran the final leg of the 400-meter relay.
The team practiced passing the baton smoothly to ensure they didn't lose time during the relay.
In modern telecommunications, a relay acts as a critical junction that receives a signal and retransmits it at a higher power to cover greater distances.
Usage
Often used as a modifier in compound nouns like 'relay race' or 'relay station'.