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English definition of “double-book”

double-book

verb [I, T often passive]     /ˌdʌb.l̩ˈbʊk/
to promise the same room , seat , ticket , etc. to different people : The room was double-booked so they had to give us a different one.Making bookings and reservations
(Definition of double-book verb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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