Using a fixed Point of Reference, not oriented in either a vertical or horizontal manner; rather using a combination of the two (2).

Comments:

Diagonal is generally associated with relative direction or orientation in relation to self or any fixed Point of Reference, such as the earth, where the primary measurable elements are both side-to-side and up-and-down.

Diagonal is most generally directly related to both the dimensions of height and width simultaneously.

Diagonal, as associated with self, is derived by standing straight and looking straight ahead with horizontal being represented by drawing a line that changes in both a top-to-down (or visa versa) and left-to-right (or visa versa) direction simultaneously.

A diagonal plane can also be accomplished using a different Point of Reference in the environment by orienting it in a line containing both elements side-to-side and top-to-bottom (or visa versa) characteristics of that element. But typically, and under normal circumstances, diagonal is most commonly used in relation to either self or the earth.

Diagonal is one of the three primary orientations used in American Kenpo. The other two being: vertical and horizontal.

Using the earth as the Point of Reference, diagonal is neither parallel nor parallel to the plane of the horizon.

One way to conceptualize a diagonal plane, is to visualize a line starting from your left, at head level, and ending at your right, at ground level (or visa versa), bisecting your body at an angle.

Example(s):

Using the clock principle, an example of a diagonal plane would be a line from 1:30 - 7:30 or 7:30 - 1:30; with the clock standing on its side and oriented directly in front of you.

Using the directional zone theory, an example of a diagonal plane would be from lower, left, flank; to straight ahead; to upper, right, flank (or visa versa).

Opposite(s):

Horizontal, Vertical

Related Definition(s):

Angle, Block, Centerline, Deliver, Depth, Dimension, Direction, Downward, Environment, Execute, Height, Horizontal, Inward, Line, Maneuver, Motion, Move, Outward, Overreach, Path, Position, Space, Strike, Travel, Upward, Vertical, Weapon, Width, Zone

Related Term(s):

Clock Principle, Completed Path of Travel, Dimensional Zone, Directional Zone Principle, Line of Travel, Path of Action, Path of Defense, Path of Delivery, Path of Execution, Path of Travel, Point of Reference