Relay (disambiguation)

Relay (from Old French: relay = leave ) stands for:

Relays, electrically operated and usually electromagnetically acting switch
Signal relay, a relay in the railway safety technology
Relay ( mail), station for replacement of riding or carriage horses
Relay station, radio station for transmission over long distances without direct connection
Repeater, signal regenerator for conversion and forwarding of received signals
Relay mode of operation for simultaneous interpreting, see Interpretation # relay
Relay ( Military ), formerly an equestrian department messaging in Military
Relay ( fortress ) in the path between fortifications fortress wall and moat