Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “you can't judge a book by its cover”

you can't judge a book by its cover

saying
said to show that you cannot know what something or someone is like by looking only at their appearanceSeeming and purporting to beFaking and pretending
(Definition of you can't judge a book by its cover from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

Word of the Day

navigate

to direct the way that a ship, aircraft, etc. will travel, or to find a direction across, along, or over an area of water or land, often by using a map

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More