light pollution

noun

1. unwanted or harmful light, as from bright street lights or neon signs.

2. Astronomy.,  artificial illumination of the sky that sets a limit on the faintness of stars that can be observed or photographed.

light pollution

noun

1. the glow from street and domestic lighting that obscures the night sky and hinders the observation of faint stars

Word History and Origins

Origin of light pollution¹

First recorded in 1970–75