Space extended upward; height; the perpendicular
elevation of an object above its foundation, above the ground, or above a
given level, or of one object above another; as, the altitude of a
mountain, or of a bird above the top of a tree.
The elevation of a point, or
star, or other celestial object, above the horizon, measured by the arc of
a vertical circle intercepted between such point and the horizon. It is
either true or apparent; true when measured from the
rational or real horizon, apparent when from the sensible or
apparent horizon.
The perpendicular distance from
the base of a figure to the summit, or to the side parallel to the base;
as, the altitude of a triangle, pyramid, parallelogram, frustum,
etc.
Height of degree; highest point or
degree.
Height of rank or excellence; superiority.
Elevation of spirits; heroics;
haughty airs.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
