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overbook

[oh-ver-boo k] /ˌoʊ vərˈbʊk/
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.
verb (used without object)
2.
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.
Origin
1900-1905
1900-05; over- + book (v.)
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for over book

overbook

/ˈəʊvəˌbuːk/
verb
1.
(transitive) to make more reservations than there are places, tickets, hotel rooms, etc, available
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
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Word Origin and History for over book

overbook

v.

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

Online Etymology Dictionary, © 2010 Douglas Harper
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