Definition of "unbooked" [un•booked]

• Not booked. (adjective)
• Simple past tense and past participle of unbook. (verb)

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• "This is the debt, yet unbooked, which is composed of the provisional claims of the creditors of the emigrants, the contractors, and various other holders of claims on the government."
• "Hotwire is a hotel booking online service (also can get flights, and car rentals); when hotels have unbooked rooms, they sell them to Hotwire and Hotwire then gives you the customer a discounted deal – five-star hotel for a three star price (as their commercials say!)."
• "Gosh that is funny about a horde of “the great unbooked” turning up for dinner, courtesy of the publishers?"