Definition of horizontal adjective from the Oxford Advanced Learner's Dictionary. flat and level; going across and parallel to the ground rather than going up and down. (informal) I was so …

The meaning of HORIZONTAL is of or relating to the apparent junction of earth and sky : situated near the horizon. How to use horizontal in a sentence.

HORIZONTAL definition: 1. parallel to the ground or to the bottom or top edge of something: 2. a horizontal line…. Learn more.

1. at right angles to the vertical; parallel to level ground. 2. flat or level: a horizontal position. 3. being in a prone or supine position; recumbent. 4. near, on, or parallel to the horizon. 5. …

Conversely, a direction, plane, or surface is said to be horizontal (or leveled) if it is everywhere perpendicular to the vertical direction. More generally, something that is vertical can be drawn …

Nov 12, 2025 · horizontal (comparative more horizontal, superlative most horizontal) Perpendicular to the vertical; parallel to the plane of the horizon; level, flat. quotations

Horizontal definition: at right angles to the vertical; parallel to level ground.. See examples of HORIZONTAL used in a sentence.

Horizontal definition: Of, relating to, or near the horizon.

The opposite of vertical, something horizontal is arranged sideways, like a person lying down. When you sleep (unless you're a horse), your body is horizontal: horizontal things are parallel …

Something that is horizontal is flat and level with the ground, rather than at an angle to it. The board consists of vertical and horizontal lines. Swing the club back until it is horizontal.