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pileup

1 ENTRIES FOUND:
pileup /ˈpajəlˌʌp/ noun
plural pileups
pileup
/ˈpajəlˌʌp/
noun
plural pileups
Britannica Dictionary definition of PILEUP
[count]
: an accident in which several or many vehicles crash into each other
: a large amount of something that has increased gradually over a period of time see also pile up at 2pile