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noun Also car pool.
  1. Also car·pool·ing, car pooling. an arrangement among a group of automobile owners by which each owner in turn drives the others or their children to and from a designated place.
  2. those included in such an arrangement.
verb (used without object)
  1. Also car-pool. to form or participate in a carpool.

Origin of carpool

First recorded in 1940–45; car1 + pool2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for carpool


verb, noun
  1. another term for carshare
Derived Formscarpooling, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012