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English definition of “fall behind”

fall behind

verb uk phrasal verb with fall   /fɔːl/ us    /fɑːl/ (fell, fallen)
to fail to do something fast enough or on time: He was ill for six weeks and fell behind with his schoolwork. I've fallen behind with the mortgage payments.Failing and doing badly
(Definition of fall behind from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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