Did you know?

Click any word in a definition or example to find the entry for that word

chi-square test - definition and synonyms


What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.



The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.

noun [countable] maths chi-square test pronunciation in British English /ˈkaɪ skweə(r) ˌtest/
Word Forms
singularchi-square test
pluralchi-square tests
  1. a test used in statistics to find out how accurate a theory was by comparing it with the actual event

Open Dictionary


the activity of exploring abandoned buildings and other manmade structures

add a word


A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog
Macmillan learn live love play