/ Dictionary / Index A altissimo: Meaning and Definition of Find definitions for: al•tis•si•mo Pronunciation: (al-tis'u-mō"It.äl-tēs'sē-mô"), [key] — Music. Music. —adj. very high. —n. in the second octave above the treble staff. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: altissimo (Thesaurus) Altiplano altitude Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language