altitude

1. The absolute height of a location, usually measured from sea level. (countable, uncountable) · As the altitude increases, the temperature gets lower, so remember to bring warm clothes to the mountains.
2. A vertical distance. (countable, uncountable)
3. The line perpendicularly connecting a figure’s vertex, especially a triangle’s apex, to the side opposite to the vertex. (countable, uncountable) · All three altitudes of any triangle will always meet at point known as the orthocentre or orthocenter.
4. The length of such a line; the distance measured perpendicularly from a figure's vertex to the side opposite to the vertex. (countable, uncountable) · The perpendicular height of a triangle is known as its altitude.
5. The angular distance of a heavenly body above our Earth's horizon. (countable, uncountable)
6. Height of rank or excellence; superiority. (countable, uncountable)
7. Elevation of spirits; heroics; haughty airs. (countable, dated, uncountable)
8. Highest point or degree. (countable, uncountable)

Plural altitudes