← Dictionary

book

/bʊk/
IELTSAcademic
noun

A set of written or printed pages fastened together inside a cover. A book usually tells a story or gives information.

  • I borrowed a book from the library.
  • She finished the book in two days.
  • This book explains basic grammar clearly.
verb

To arrange or reserve something for a future time. This is common for travel, hotels, and appointments.

  • We booked a train ticket online.
  • They booked the meeting room for Friday.
  • Please book a table for six.

Adinary Nuance

Book is the everyday word for a printed or digital work with pages. It is more specific than text, volume, or publication in many casual uses. As a verb, book means to reserve, not to write down or record in general. For example, you book a hotel room, but you do not usually book a classroom or a bus plan.

In other languages

Vietnamese
sách
Spanish
libro
Chinese
Japanese
Korean

Etymology

The noun comes from Old English bōc, from a Germanic word for a written work. The verb sense became common later, in the 19th century, from keeping records in a book.

Common phrases

a book of poemsbook reviewbook coverbook a room

Synonyms

Related words

Frequently asked questions

Is 'book' formal or informal?
It is a very common neutral word. It works in everyday speech, school writing, and business writing.
What is the difference between 'book' and 'reserve'?
They are very close when you talk about arranging something for later. 'Book' is more common in everyday English, especially for travel and services.
Can 'book' mean something digital?
Yes. It can mean an ebook or any long written work, printed or digital.
Is 'book' used as a verb in IELTS writing?
Yes, especially in topics about travel, hotels, or appointments. It is clear and natural.