Definition of overbook verb from the Oxford Advanced American Dictionary

 

overbook

 verb
verb
NAmE//ˌoʊvərˈbʊk//
 
[transitive, intransitive]overbook (something)Verb Forms present simple I / you / we / they overbook
 
he / she / it overbooks
 
past simple overbooked
 
-ing form overbooking
 
 
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to sell more tickets on a plane or reserve more rooms in a hotel than there are places available The flight was heavily overbooked. compare double-book
See the Oxford Advanced Learner's Dictionary entry: overbook