glooming I. gloomingadjective Etymology: from present participle of gloom (I) : dimly glimmering : dark, gloomy < the glooming interior of an old inn > • glooming·lyadverb II. gloom·ing\ˈglümiŋ, -mēŋ\noun (-s) Etymology: probably from gerund of gloom (I) archaic: gloaming