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overbook

[oh-ver-boo k]
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verb (used with object)
  1. to accept reservations for in excess of the number that can be accommodated: The airline routinely overbooks its flights so as to fill its planes even if there are last-minute cancellations.
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verb (used without object)
  1. to accept reservations in excess of the number that can be accommodated: If the hotel has overbooked, some of the conventioners won't have a place to stay.
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Origin of overbook

1900–05; over- + book (v.)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for overbook

overbook

verb
  1. (tr) to make more reservations than there are places, tickets, hotel rooms, etc, available
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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

Word Origin and History for overbook

v.

"to sell more tickets than there are seats," 1903, from over- + book (v.); originally in reference to theaters. Related: Overbooked; overbooking.

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Online Etymology Dictionary, © 2010 Douglas Harper