Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “bestseller”


noun [C]     /ˌbestˈselər/
B2 a very popular book that many people have bought Kinds of books
best-selling adjective [always before noun] best-selling authors
(Definition of bestseller noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “bestseller” in other dictionaries

Word of the Day


relating to behaviour between people that is pleasant and friendly, often despite a difficult situation

Word of the Day


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