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pile-driving
pile on
pile up
pilea
pileate
pilei
piles
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pileup
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pileup
pile·up [ pl ùp ] (plural pile·ups) or pile-up (plural pile-ups)


noun 
Definition:
 
1. large-scale collision: a collision involving several vehicles
2. accumulation of things: an accumulated number or amount of things such as tasks
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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