To overbook is to reserve seats or rooms for more people than there are seats or rooms available.verb
An example of overbook is to sell more tickets than there are seats on a flight.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
transitive verb, intransitive verb
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verb o·ver·booked, o·ver·book·ing, o·ver·books verb, transitive
- oˌver·bookˈing noun