basso pro·fun·do \-prəˈfən(ˌ)dō, -u̇n-, -ün-\noun (pluralbassi profun·di \-(ˌ)dē\ ; orbasso profundos \-(ˌ)dōz\) Etymology: Italian basso profondo, literally, deep bass 1.: a deep heavy bass voice with a compass extending to about C below the bass staff — compare basso cantante 2.: a person having a basso profundo voice