Aspect Ratio Definition

noun
The width-to-height ratio of an image or of the area used to display an image. Most widescreen televisions have an aspect ratio of 16:9.
American Heritage
The ratio between any two dimensions, as width and height: it is used in describing airplane wings, movie film, etc.
Webster's New World
The span-to-mean-chord ratio of an airfoil.
American Heritage

The ratio of an object's longest dimension to its next-longest dimension.

Wiktionary

The ratio of width to height in a flat surface or 2-dimensional abstract construction, such as an image, character, or pixel. 4:3 (1.33:1) is the standard ratio for NTSC video. 1.85:1 and 2.35:1 are the most common aspect ratios for motion pictures.

Wiktionary
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other

In video display, the relationship between the width and the height of the image. The NTSC standard, for example, specifies a 4:3 (4 wide to 3 high) aspect ratio. See also NTSC and video.

Webster's New World Telecom

Other Word Forms of Aspect Ratio

Noun

Singular:
aspect ratio
Plural:
aspect-ratios

Origin of Aspect Ratio

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aspect ratio