Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “neon”


noun [U]     /ˈniːɒn/
a gas that produces bright, colourful light when electricity passes through it, often used in signs (formula Ne): neon lights/signs Chemical elements
(Definition of neon noun from the Cambridge Learner's Dictionary © Cambridge University Press)

Definitions of “neon” in other dictionaries

Word of the Day


a situation in which two people are friends

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