1.(criminal)黑道；黑社会；犯罪团伙
a Spanish Harlem underworld of gangs, drugs and violence充斥着犯罪团伙、毒品和暴力的西班牙哈莱姆区黑社会
2.the underworld
(of the dead)地狱；阴间；冥府
Orpheus descended into the underworld to look for Eurydice.俄耳甫斯下到地狱去寻找欧律狄刻。
Persephone, goddess of the underworld冥后珀耳塞福涅