Definition of double-book in English:

double-book

verb

[WITH OBJECT]usually be double-booked
  • Reserve (something, especially a seat or a hotel room) for two different customers or parties at the same time.

    ‘the hotel was double-booked’
    • ‘Until, that is, someone called to say their rooms had been inadvertently double-booked.’
    • ‘I was informed on arrival that my host and her boyfriend in a fine bit of mutual consultation had double-booked the single bed in the spare room (which had belonged to my host as a child).’
    • ‘Those idiots have double-booked a press conference and a meeting and it's utter pandemonium.’
    • ‘When the rooms were double-booked, the reps would lose theirs, and everyone ended the season completely exhausted.’
    • ‘Worries about money, the car and possibly no shows in Brighton in the summer before London as the chorus dancers have been double-booked into Seville.’
    • ‘The program's intuitive interface and dual calendaring system make it impossible to double-book rooms.’
    • ‘Most were there to celebrate Co-operative Day, a festival organised by workers' credit unions, but the park seemed to have been double-booked by the Make Poverty History campaign, who are handing out makeshift white wristbands.’

Pronunciation:

double-book

/ˌdəbəlˈbo͝ok/