from The American Heritage® Dictionary of the English Language, 5th Edition.

  • 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.
  • noun The span-to-mean-chord ratio of an airfoil.

from the GNU version of the Collaborative International Dictionary of English.

  • (Aëronautics) The ratio of the long to the short side of an aëroplane, aërocurve, or wing.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

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

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the ratio of the width to the height of a tv picture


from Wiktionary, Creative Commons Attribution/Share-Alike License

aspect + ratio


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  • (n): in filmography, the proportions of the frame. In 16mm and 35mm the camera photographs a slightly square image, with an aspect ratio of 1.33 to 1. In 35mm the image is usually shot with the Academy Aperture and then masked in the projector to produce a wider image: 1.85 in the U.S. and 1.66 in Europe.

    January 17, 2009