WordNet sense 1 (an adult male singer with the lowest voice):

basso

WordNet sense 2 (the lean flesh of a saltwater fish of the family Serranidae):

sea bass

WordNet sense 3 (any of various North American freshwater fish with lean flesh (especially of the genus Micropterus)):

freshwater bass

WordNet sense 4 (the lowest part in polyphonic music):

bass part

WordNet sense 5 (the lowest adult male singing voice):

bass voice

WordNet sense 6 (having or denoting a low vocal or instrumental range):

deep

WordNet sense 7 (used of sounds and voices; low in pitch or frequency):

low, low-pitched