[pee-uh-nis-uh-moh; It. pyah-nees-see-maw] 
adjective, adverb, noun, plural -mos. Music.| 1. | very soft. |
| 2. | very softly. |
| 3. | a passage or movement played in this way. |
| pi·a·nis·si·mo (pē'ə-nĭs'ə-mō') adv. & adj. Abbr. pp In a very soft or quiet tone. Used chiefly as a direction. n. pl. pi·a·nis·si·mos A part of a composition played very softly or quietly. [Italian, superlative of piano, soft; see piano2.] |
A musical direction meaning “to be performed very softly”; the opposite of fortissimo.
əˈnɪs