Meaning of RELAY in English

RELAY

(TEAM) [noun] [C] - a group of people who continue an activity that others from the same team or organization have been doing previouslyRelays of workers kept the machines going through the night.After the landslide, volunteers worked in relays to rescue people buried under the rubble.A relay (race) is a running or swimming race between two or more teams in which each person in the team runs or swims part of the race.The Jamaican relay team won the gold for the 400m relay.

Cambridge English vocab.      Кембриджский английский словарь.