Longman Dictionary of Contemporary English homepage

relay

1 noun
     
Related topics: Sport
re‧lay1
1

in relays

if people do something in relays, several small groups of them do it, one group after another, so that the activity is continuous
2 [countable]DS a relay race:
the 100 metres relay
3 [uncountable and countable]TCB a piece of electrical equipment that receives radio or television signals and sends them on

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