Definitions for aspect ratio
This page provides all possible meanings and translations of the word aspect ratio
Random House Webster's College Dictionary
the ratio of the span of an airfoil to its mean chord.
the ratio of the width of a televised or computer-screen image to its height.
Category: Radio and Television
Origin of aspect ratio:
the ratio of the width to the height of a tv picture
The ratio of an object's longest dimension to its next-longest dimension.
The ratio of width to height in a flat surface or 2-dimensional abstract construction, such as an image, character, or pixel. 4:3 (or 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.
Origin: aspect + ratio
The aspect ratio of an image describes the proportional relationship between its width and its height. It is commonly expressed as two numbers separated by a colon, as in 16:9. For an x:y aspect ratio, no matter how big or small the image is, if the width is divided into x units of equal length and the height is measured using this same length unit, the height will be measured to be y units. For example, consider a group of images, all with an aspect ratio of 16:9. One image is 16 inches wide and 9 inches high. Another image is 16 centimeters wide and 9 centimeters high. A third is 8 yards wide and 4.5 yards high. The most common aspect ratios used today in the presentation of films in movie theaters are 1.85:1 and 2.39:1. Two common videographic aspect ratios are 4:3, the universal video format of the 20th century, and 16:9, universal for high-definition television and European digital television. Other cinema and video aspect ratios exist, but are used infrequently. In still camera photography, the most common aspect ratios are 4:3, 3:2, and more recently being found in consumer cameras 16:9. Other aspect ratios, such as 5:3, 5:4, and 1:1, are used in photography as well, particularly in medium format and large format.
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"aspect ratio." Definitions.net. STANDS4 LLC, 2014. Web. 22 Oct. 2014. <http://www.definitions.net/definition/aspect ratio>.