# aperture

> English word · Noun · IPA /ˈap.ə.t͡ʃə/ · frequency rank #15,569

## Definitions
1. A small or narrow opening, gap, slit, or hole.
2. A hole which restricts the diameter of the lightpath through one plane in an optical system.
3. A hole which restricts the diameter of the lightpath through one plane in an optical system.
4. The (typically) large-diameter antenna used for receiving and transmitting radio frequency energy containing the data used in communication satellites, especially in the geostationary belt. For a comsat, this is typically a large reflective dish antenna; sometimes called an array.
5. The maximum angle between the two generatrices.

## Etymology
From late Middle English, from Latin apertūra (“an opening”), from aperiō (“to uncover, make or lay bare”) + -tūra (“-ure”, action noun suffix). Doublet of overture.

## Common misspellings (11)
`aeprture`, `aperrture`, `apertrue`, `apertture`, `apertuer`, `aperturre`, `aperutre`, `apetrure`, `apperture`, `apreture`, `paerture`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/aperture