altitude

noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about altitude at Wordnik → Where our words come from →

1. Elevation especially above sea level or above the earth's surface.

   the altitude gave her a headache

2. The perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel).
3. Angular distance above the horizon (especially of a celestial object).