noun

1. The absolute height of a location, usually measured from sea level.

   "As the altitude increases, the temperature gets lower, so remember to bring warm clothes to the mountains."

2. A vertical distance.

3. The distance measured perpendicularly from a figure's vertex to the opposite side of the vertex.

   "The perpendicular height of a triangle is known as its altitude."

4. The angular distance of a heavenly body above our Earth's horizon.

5. Height of rank or excellence; superiority.

6. (in the plural) Elevation of spirits; heroics; haughty airs.

7. Highest point or degree.