In astronomy, geography, and related sciences and contexts, a direction or plane passing by a given point is said to be vertical if it contains the local gravity direction at that point. Conversely, a direction or plane is said to be horizontal if it is perpendicular to the vertical direction.

Does horizontal mean up and down?

The terms vertical and horizontal often describe directions: a vertical line goes up and down, and a horizontal line goes across. You can remember which direction is vertical by the letter, "v," which points down.

What is horizontal example?

The definition of horizontal is something that is parallel to the horizon (the area where the sky seems to meet the earth). An example of a horizontal line is one that goes across the paper. adjective.