Definition of HORIZONTAL


Horizontal is an adjective that describes a direction, alignment, or orientation parallel to the horizon or perpendicular to the vertical direction.

Direction and Orientation: The term horizontal refers to a spatial orientation or alignment that is parallel to the horizon, as opposed to being perpendicular or vertical. In geometric terms, it signifies a level or flat position relative to the Earth’s surface.

Parallel to the Horizon: Objects or surfaces that are horizontal lie flat or level with the ground when viewed in the context of the observer’s position. This orientation is commonly encountered in everyday landscapes, architectural structures, and physical layouts.

Alignment and Arrangement: In various contexts, the term horizontal is used to describe the arrangement or layout of objects, elements, or components that extend along a level or flat plane. For example, a “horizontal line” in geometry extends parallel to the x-axis.

Visual and Spatial Perception: The concept of horizontal is fundamental to human perception and understanding of spatial relationships. It contrasts with vertical orientation and plays a crucial role in architectural design, photography, art, and other visual disciplines.

In summary, horizontal denotes a direction or alignment parallel to the horizon or perpendicular to the vertical direction. It describes spatial relationships, orientations, and arrangements that are level or flat relative to the observer’s position, with implications for various fields of study and practical applications.

Examples of HORIZONTAL in a sentence

  • The shelves are arranged in a horizontal line along the wall.
  • The sun dipped below the horizontal line of the horizon, painting the sky with vibrant colors.
  • She preferred a horizontal position for sunbathing on the beach.
  • The company logo features a bold, horizontal design.
  • The road stretched out in a horizontal line across the flat landscape.
  • The artist created a series of horizontal strokes to depict the tranquil waters of the lake.
  • The table was made from several horizontal slabs of wood.
  • The skyscraper’s windows formed a striking horizontal pattern against the skyline.


The term horizontal has a linguistic history that spans various languages, reflecting its evolution in meaning and usage over time.

  • Latin Origins: The term “horizontal” originates from the Latin word “horizontem,” which means “boundary” or “line of division.” In its original context, “horizontal” was used to describe a line that divides the visible plane into two equal parts, typically representing the horizon.
  • Greek Influence: The Latin word “horizontem” itself is derived from the Greek word “horizon,” which means “to bound” or “to limit.” The Greek term referred to the apparent line that separates the earth from the sky, known as the horizon.
  • Integration into Middle English: The term “horizontal” entered Middle English from Latin and French sources during the medieval period. Initially, it retained its association with the horizon and the horizontal plane, describing lines or surfaces that are parallel to the horizon.
  • Modern Usage in English: In contemporary English, “horizontal” is commonly used to describe lines, planes, or surfaces that are parallel to the horizon or to the ground. It denotes a direction perpendicular to the vertical, often associated with concepts such as levelness, flatness, or evenness.

The term horizontal thus represents a linguistic evolution from its Latin and Greek origins, through influences from other languages during the medieval period, to its modern usage in English, where it describes lines or surfaces parallel to the horizon or ground.


  • Level
  • Parallel
  • Flat
  • Even
  • Plane
  • Parallel to the ground
  • Uniform
  • Equidistant


  • Vertical
  • Sloping
  • Inclined
  • Diagonal
  • Uneven
  • Ascending
  • Tilted
  • Angular


  • Parallelism
  • Horizon
  • Alignment
  • Equality
  • Equilibrium
  • Consistency
  • Symmetry
  • Uniformity

🌐 🇬🇧 HORIZONTAL in other languages

Terms of Use

Privacy & Cookies


Who We Are

Main Sections


Geographical Locations



Let´s Talk



® 2024 https://DefinitionGo.com