book · noun C /bʊk/Full view
A1 a set of attached pages in a cover, with words or pictures that tell a story or provide information
Dictionary examples:

I've read all his books.

She wrote a book about the island's history.

I bought a book about Quebec.

an art/picture/children's/reference book

Learner example:

I like reading books in the library. (Skills for Life (Entry 1); A1; Turkish)

B1 a set of attached pages in a cover, which are blank to write or draw on or have spaces to record information
Dictionary examples:

I need to get a composition/exercise book for writing class.

an order/address book


Learner example:

You have to bring with you some pencils for drawing and a drawing book. (Key English Test; A2; French)

a book of stamps/tickets, etc.
C2 a set of stamps, tickets, etc. that are sold together inside a cover
Dictionary example:

I'll get a book of stamps when I go to the post office tomorrow.

not judge a book by its cover
C2 to not decide what someone or something is like only by looking at them
Dictionary example:

You know, his desk is a mess but don't judge a book by it's cover, he does careful, detailed work.

Learner example:

I'm simply pointing out one should never judge a book by it's cover as things aren't alway[s] what they seem. (Certificate of Proficiency in English; C2; Portuguese)

do sth by the book
C2 to do something exactly according to the rules
Dictionary example:

The lawyers want to make sure we've done everything strictly by the book.

Learner example:

The upper-class people always do things by the book, follow the rules and the conventions and therefore are stand-offish and cold. (Certificate of Proficiency in English; C2; French)

book · verb I or T /bʊk/
B1 to arrange to use or do something at a particular time in the future
Dictionary examples:

You need to book your flight before the fares go up.

Book early/in advance to get a good room.

The hotel is booked solid / fully booked for the next three weeks.

Learner example:

They told me that it's better to book a room in advance. (First Certificate in English; B2; Russian)

book sb in or book sb into sth
B1 to arrange for someone to stay at a hotel
Dictionary example:

She booked me into a hotel uptown.

Learner example:

You all have been booked into the "Palace Hotel" which is one of the most comfortable [hotels] in town. (First Certificate in English; B2; Turkish)

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