from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The width-to-height ratio of a film or television image.
  • n. The span-to-mean-chord ratio of an airfoil.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The ratio of an object's longest dimension to its next-longest dimension.
  • n. 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 the GNU version of the Collaborative International Dictionary of English

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

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

  • n. the ratio of the width to the height of a tv picture


aspect + ratio (Wiktionary)


  • The aspect ratio 16:9 was decided upon, compatible with widescreen movies shot in CinemaScope, Panavision or other anamorphic squeezed by the camera lens, then unsqueezed by the projector lens systems.

    The Movie Business Book, Third Edition


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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