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all' ottava

[ahl uh-tah-vuh; Italian ahl-lawt-tah-vah]
noun Music.
  1. a direction (8va), placed above or below the staff to indicate that the passage covered is to be played one octave higher or lower respectively.
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Origin of all' ottava

1815–25; < Italian: literally, at the octave
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018