aspect ratio

American  

[as-pekt rey-shoh, rey--shee-oh] / ˈæs pɛkt ˌreɪ ʃoʊ, ˌreɪ ˌʃi oʊ /

noun

1. Aeronautics. the ratio of the span of an airfoil to its mean chord.

2. Digital Technology, Television. the ratio of the width of an image to its height, usually a standard ratio such as 16 to 9 or 4 to 3.

3. Naval Architecture. the ratio of the height of a rudder to its fore-and-aft length.

4. Rocketry.

   1. Also called fineness ratio.  Also called slenderness ratio.  the ratio of the mean diameter of the body of a rocket or missile to its length.

   2. the ratio of the length of the combustion chamber of a rocket motor to its diameter.

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aspect ratio British  

noun

1. the ratio of width to height of the picture on a television or cinema screen

2. aeronautics the ratio of the span of a wing to its mean chord

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Etymology

Origin of aspect ratio

First recorded in 1905–10

Example Sentences

See Examples For:

aspect ratio

The main screen is also a 4:3 aspect ratio.

From The Wall Street Journal ● Sep. 10, 2026

Measuring 4.5 millimetres thick when unfolded, it features a 7.6-inch, 4:3 aspect ratio screen optimised for video viewing.

From Barron's ● Jul. 22, 2026

Filming in a constricting boxy aspect ratio, the Ukrainian director takes us inside a corroding prison filled with men unjustly incarcerated as enemies of the state.

From Los Angeles Times ● Mar. 26, 2026

"We found a way to synthesize low defect density, high quality, single phase cubic gallium nitride by using an aspect ratio phase trapping technique that the Bayram group has invented," explains Lee.

From Science Daily ● Jan. 23, 2024

This was intended to give increased strength and permitted of a greater wing-spread and consequently improved aspect ratio.

From A History of Aeronautics by Evelyn Charles Vivian