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English definition of “backlog”

backlog

noun [C, usually singular]     /ˈbæklɒɡ/
a large number of things you have to do or deal with that has increased over a period of time: She has a three-week backlog of work. a backlog of orders a growing/huge backlogcatch up on/deal with/clear a backlog I need to catch up on my backlog of emails before I can start work.
(Definition of backlog noun from the Cambridge Business English Dictionary © Cambridge University Press)
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