What is the meaning of Relay?

A new set of hounds.

A new set of horses kept along a specific route so that they can replace animals that are tired.

A new set of anything.

A series of vehicles travelling in sequence.

A competition between teams where members of a team take turns completing parts of a course or performing a certain action.

A track and field discipline where runners take turns in carrying a baton from start to finish. The most common events are 4×100 meter and 4×400 meter competitions.

An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current.

To pass on or transfer (information).

To release a new set of hounds.

To place (people or horses) in relays, such that one can take over from another.

To take on a new relay of horses; to change horses.

Alternative spelling of re-lay

Source: wiktionary.org