"Horizontal" refers to a direction or orientation that is parallel to the horizon. It is often used to describe lines, surfaces, or objects that are level and do not incline upward or downward. For example, a table is typically horizontal, providing a flat surface for various activities. In geometry, a horizontal line is one that runs from left to right, maintaining a constant height. This concept is important in various fields, including architecture, engineering, and art, where understanding horizontal alignment can affect design and functionality.