Dictionary
al•tis•si•mo
Pronunciation: (al-tis'u-mō"; It.äl-tēs'sē-mô"), [key] Music.
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adj.
very high.
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n.
in altissimo, in the second octave above the treble staff.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.