Definitions for aspect ratio
This page provides all possible meanings and translations of the word 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, 2015. Web. 29 Nov. 2015. <http://www.definitions.net/definition/aspect ratio>.