Book is one of the most commonly used words in English with multiple meanings:
1. A written or printed work consisting of pages glued or sewn together along one side and bound in covers.
2. To arrange for someone to have a seat on a plane, room in a hotel, etc. at a particular time in the future.
3. In accounting, the financial records of a business.
4. In sports, the official record of bets placed.
5. Slang meaning "to leave quickly" (e.g. "Let's book out of here!").