Definition of neon noun from the Oxford Advanced Learner's Dictionary

 

neon

 noun
noun
BrE BrE//ˈniːɒn//
 
; NAmE NAmE//ˈniːɑːn//
 
[uncountable](symbol Ne)
 
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a chemical element. Neon is a gas that does not react with anything and that shines with a bright light when electricity is passed through it. neon lights/signs Word Origin late 19th cent.: from Greek, literally ‘something new’, neuter of the adjective neos.
See the Oxford Advanced American Dictionary entry: neon