light pollution
noun
unwanted or harmful light, as from bright street lights or neon signs.
Astronomy.
artificial illumination of the sky that sets a limit on the faintness of stars that can be observed or photographed.
Origin of light pollution
First recorded in 1970–75
Words nearby light pollution
light on,
light opera,
light out,
light pen,
light pipe,
light pollution,
light quantum,
light rail,
light reaction,
light reflex,
light show
British Dictionary definitions for light pollution
light pollution
noun
the glow from street and domestic lighting that obscures the night sky and hinders the observation of faint stars