Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “old chestnut”

old chestnut

informal
a subject, idea, or joke that has been discussed or repeated so often that it is not funny any more: I wondered whether there might, after all, be some truth in the old chestnut that one's school days are the happiest of one's life.Tedious and uninspiring
(Definition of old chestnut from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

Translations of “old chestnut”

Word of the Day

scrumpy

an alcoholic drink made from apples

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