Meaning of the word "booked up" in English

What does "booked up" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

booked up

US /bʊkt ʌp/
UK /bʊkt ʌp/

Adjective

fully reserved or scheduled; having no more availability

Example:
The restaurant is completely booked up for the weekend.
My schedule is booked up for the next two weeks.