aperture
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aperture
- /ˈap.ə.t͡ʃə/ UK
- /ˈap.ə.tjʊə/ UK
- /ˈæp.ɚˌt͡ʃʊɹ/ US
- /ˈæp.ɚ.t͡ʃɚ/ US
- /ˈæp.ɚˌtjʊɹ/ US
- /ˈæp.ɚˌtʊɹ/ US
Rhymes with -æpə(ɹ)tʃə(ɹ), -æpə(ɹ)tjʊə(ɹ), -æpə(ɹ)tʃʊə(ɹ)
Where it comes from
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 and apertura.
noun apertures
-
A small or narrow opening, gap, slit, or hole.
an aperture in a wall
Similar: chink
- A hole which restricts the diameter of the lightpath through one plane in an optical system.
- The diameter of such a hole which restricts the width of the lightpath through the whole system. For a telescope, this is the diameter of the objective lens. This telescope has a 100 cm aperture.
- 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.
- The maximum angle between the two generatrices. If the generatrix makes an angle θ to the axis, then the aperture is 2θ.
Thesaurus
Closest in meaning: chink, cleft, slit, outlet, crack, hole, transparency, slot, orifice, ovate, launching, unlock, opener, seam, opening, semicircular
Translations
Every language
noun hole restricting the diameter of the lightpath through one plane
| Español | apertura, abertura |
|---|---|
| 日本語 | 開口 kaikō |
| 中文 | 光圈 guāngquān |
| हिन्दी | द्वारक dvārak |
| Português | abertura |
| Deutsch | Blende |
| Русский | затвор zatvor, обтюратор obtjurator, диафра́гма diafrágma |
noun diameter of the aperture
| Español | apertura, abertura |
|---|---|
| Português | abertura |
| Français | ouverture |
| Deutsch | Blendenzahl |
| Русский | диафра́гма diafrágma, апертура apertura |
Talk about this word "aperture." Wiktionary, via Micwyn, micwyn.com/word/aperture. Accessed 6 Nov. 2026. aperture. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/aperture "aperture." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/aperture.Cite this
@misc{aperture_2026,
title = {aperture},
howpublished = {Wiktionary, via Micwyn},
year = {2026},
url = {https://micwyn.com/word/aperture},
urldate = {2026-11-06}
}
