Meaning

noun a state of partial or total darkness

noun a feeling of melancholy apprehension

noun an atmosphere of depression and melancholy

originFrom Middle English *gloom, *glom, from Old English glōm (“gloaming, twilight, darkness”), from Proto-West Germanic *glōm, from Proto-Germanic *glōmaz (“gleam, shimmer, sheen”), from Proto-Indo-European *ǵʰley- (“to gleam, shimmer, glow”). The English word is cognate with Norwegian glom (“transparent membrane”), Scots gloam (“twilight; faint light; dull gleam”).

Etymology from Wiktionary, CC BY-SA 3.0