the chemical element of atomic number 10, an inert gaseous element of the noble gas group. It is obtained by the distillation of liquid air and is used in fluorescent lamps and illuminated advertising signs. (Symbol: Ne)
fluorescent lighting or signs using neon or another gas:the lobby of the hotel was bright with neon
[count noun] a small lamp containing neon:neons indicate the state of the mains wiring
[as modifier] very bright or fluorescent in colour:she had recently dyed her hair neon pink
