book 作为动词还有预订和登记的意思，如果酒店、餐馆或者电影院被预订满了，就可以说“booked solid”。

【例句】
Miss, we are booked solid on that date.
小姐，你说的那天我们饭店客满。

The car ferries from China are often fully booked by February.
来自中国的汽车轮渡通常在2月份就被预订一空。