Definition of neon
(Entry 1 of 2)
1
: a nonmetallic chemical element that is found in minute amounts in air and is used especially in electric lamps, in lasers, and as a cryogenic refrigerant — see Chemical Elements Table
2a
: a discharge lamp in which the gas contains a large proportion of neon
b
: a sign composed of such lamps
c
: the illumination provided by such lamps or signs
neon
adjectiveDefinition of neon (Entry 2 of 2)
1
: of, relating to, or using neon
2
: extremely bright : fluorescent
neon yellow
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Merriam-Webster unabridged
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Time Traveler for neon
The first known use of neon was in 1898
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