Meaning

noun (folklore) fairies that are somewhat mischievous

originUncertain; the following etymologies have been suggested: * A variant of goblin. * From Irish gruaimín (“gloomy little person”); or from Dutch gremmelen (“to soil, stain; to spoil”), or griemelen, grimmelen (“(obsolete) to abound, teem; to swarm”); but Oxford English Dictionary says there is little evidence for such derivations. The word was popularized, especially in the United States, by the…

Etymology from Wiktionary, CC BY-SA 3.0