Definify.com
Webster 1913 Edition
Perpendicular
Perˊpen-dic′u-lar
,Adj.
1.
Exactly upright or vertical; pointing to the zenith; at right angles to the plane of the horizon; extending in a right line from any point toward the center of the earth.
2.
(Geom.)
At right angles to a given line or surface;
as, the line
. ad
is perpendicular
to the line bc
Perpendicular style
(Arch.)
, a name given to the latest variety of English Gothic architecture, which prevailed from the close of the 14th century to the early part of the 16th; – probably so called from the vertical style of its window mullions.
Perˊpen-dic′u-lar
,Noun.
1.
A line at right angles to the plane of the horizon; a vertical line or direction.
2.
(Geom.)
A line or plane falling at right angles on another line or surface, or making equal angles with it on each side.
Webster 1828 Edition
Perpendicular
PERPENDIC'ULAR
,Adj.
1.
Hanging or extending in a right line from any point towards the center of the earth or of gravity, or at right angles with the plane of the horizon.2.
In geometry, falling directly on another line at right angles. The line A is perpendicular to the line B.PERPENDIC'ULAR
,Noun.
1.
In geometry, a line falling at right angles on another line, or making equal angles with it on each side.