neon

neon — noun

1. A colourless, odourless gas that makes up a tiny fraction of the air. It stays c

1.nounB1
Definition

A colourless, odourless gas that makes up a tiny fraction of the air. It stays chemically inactive and gives off a red-orange glow under an electric current. This gas is used in signs, lights, and certain lasers.

Example

The bright red sign above the diner was filled with neon gas.

collocation: neon gas / neon sign

Scientists use small amounts of neon in some lasers and specialised lights.

Common collocations
  • neon gas
  • neon light
  • neon sign
  • neon tube
  • neon lamp
  • neon glow
Synonyms
  • inert gas

    technical category of gases including neon; not a synonym in everyday usage

Grammar Patterns

neon + noun (neon sign, neon light, neon gas)

Usage Note

Frequently used before another noun (neon sign, neon light, neon tube), where it functions similarly to adjective sense 1. The chemical symbol is Ne.

Common Mistakes

The red glow in the sign comes from helium.
The red glow in the sign comes from neon.
Helium glows pink or pale yellow; neon produces a distinct red-orange light.
Neon reacts easily with oxygen.
Neon does not react with other elements.
Neon is a noble gas and is chemically inert.

neon — adjective

Word family

  • neon sign
    noun phraseB1
  • neon light
    noun phraseB1
  • neon-coloured
    adjectiveB2

Synonym discussion

Sense: adjective/2

All four words describe strong colour, but they differ in register and connotation. 'Bright' is the most general term — any colour that is not dark or dull can be called bright. 'Neon' and 'fluorescent' are more specific: 'neon' suggests the artificial, almost glowing intensity of a neon sign (like neon green or neon pink), while 'fluorescent' is slightly more technical and often used for colours that seem to glow under daylight or UV light. 'Vivid' emphasises clarity and richness (a vivid blue sky), without the artificial feel that 'neon' carries. 'Garish' is negative — it describes colour that is too loud and unpleasant (a garish orange suit). For describing sportswear, safety gear, or club posters, 'neon' is the most natural choice; for a description in formal writing, 'bright' or 'vivid' may fit better.

fluorescent ↗bright ↗vivid ↗garish

Common collocations

Nouns

Phrases

  • bathed in neon
  • glowing with neon
  • lit by neon

Etymology

GreekEnglishChinese

Neon was discovered in 1898 by British chemists William Ramsay and Morris Travers. They named it from the Greek word 'neos' (νέος), meaning 'new', because it was a newly found element. The Chinese chemical name 氖 (nǎi) was created as a phonetic-semantic compound, while the word 霓虹 (níhóng) — used for neon lights and signs — was borrowed from the English pronunciation 'neon' and written with characters that suggest a colourful rainbow-like glow.