UNDERGROUND s.n., adj. inv. Spectacol experimental (de avangardă). [Pr.: ándăr-graund] ( engl. amer. underground)UNDERGROUND [ANDĂR-GRAUND] s. n., adj. inv. spectacol experimental (de avangardă). ( amer. underground)underground (angl.) [pron. ándărgraund] adj. invar.