Definitions from Wiktionary ( )

▸ noun:  (hunting, rare) A new set of hounds.
▸ noun:  (now chiefly historical) A new set of horses kept along a specific route so that they can replace animals that are tired.
▸ noun:  (by extension) A new set of anything.
▸ noun:  A series of vehicles travelling in sequence.
▸ noun:  (sports) A competition between teams where members of a team take turns completing parts of a course or performing a certain action.
▸ noun:  (athletics) 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.
▸ noun:  (electronics) An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current.
▸ verb:  (transitive) To pass on or transfer (information).
▸ verb:  (obsolete, intransitive, hunting) To release a new set of hounds.
▸ verb:  (transitive, now rare) To place (people or horses) in relays, such that one can take over from another.
▸ verb:  (intransitive, now rare) To take on a new relay of horses; to change horses.
▸ verb:  Alternative spelling of re-lay [(transitive) To lay (for example, flooring or railroad track) again.]

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