alt (ălt)
adj.
Pitched in the first octave above the treble staff; high.

n.

1. The first octave above the treble staff.
2. A note or tone in the alt octave.

[Latin altus, high.]

---

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

---