noun
Meaning 1
A small or narrow opening, gap, slit, or hole.
Definition source: English Wiktionary via Wiktextract
Examples
- an aperture in a wall
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Standard Lemma guide
aperture
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
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Received-Pronunciation: /ˈap.ə.t͡ʃə/
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Received-Pronunciation: /ˈap.ə.tjʊə/
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Southern-England: Recorded audio is listed in the source snapshot.
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General-American: /ˈæp.ɚˌt͡ʃʊɹ/
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General-American: /ˈæp.ɚ.t͡ʃɚ/
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General-American: /ˈæp.ɚˌtjʊɹ/
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General-American: /ˈæp.ɚˌtʊɹ/
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rhymes with -æpə(ɹ)tʃə(ɹ)
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rhymes with -æpə(ɹ)tjʊə(ɹ)
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rhymes with -æpə(ɹ)tʃʊə(ɹ)
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CMU ARPABET: AE1 P ER0 CH ER0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
noun
Meaning 2
A hole which restricts the diameter of the lightpath through one plane in an optical system.
Definition source: English Wiktionary via Wiktextract
Topics: engineering, natural-sciences, optics, physical-sciences, physics
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 3
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.
Definition source: English Wiktionary via Wiktextract
Topics: arts, astronomy, engineering, hobbies, lifestyle, natural-sciences, optics, photography, physical-sciences, physics
Examples
- This telescope has a 100 cm aperture.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 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.
Definition source: English Wiktionary via Wiktextract
Qualifier: space flight
Topics: communication, communications
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 5
The maximum angle between the two generatrices.
Definition source: English Wiktionary via Wiktextract
Usage: rare
Topics: mathematics, sciences
Examples
- If the generatrix makes an angle θ to the axis, then the aperture is 2θ.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
noun
Meaning 6
an man-made opening; usually small
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: opening
Narrower terms: mouthpiece, embouchure
noun
Meaning 7
a device that controls amount of light admitted
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: regulator
noun
Meaning 8
a natural opening in something
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
Broader terms: hole
Narrower terms: pupil, micropyle, stoma, stomate, pore
History
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 and apertura.
Across languages
Translations
84 source translations are retained for this English entry.
- Bulgarian: отвор (otvor) — opening, hole
- Bulgarian: отверстие (otverstie) — opening, hole
- Chinese Mandarin: 孔 (kǒng) — opening, hole
- Danish: åbning — opening, hole
- Dutch: opening — opening, hole
- Esperanto: aperturo — opening, hole
- Finnish: aukko — opening, hole
- Finnish: reikä — opening, hole
- French: ouverture — opening, hole
- Georgian: სანათური (sanaturi) — opening, hole
- Georgian: ხვრელი (xvreli) — opening, hole
- Georgian: ჭუჭრუტანა (č̣uč̣ruṭana) — opening, hole
- Georgian: ნაპრალი (naṗrali) — opening, hole
- German: Öffnung — opening, hole
- Ancient Greek: τρῆμα (trêma) — opening, hole
- Hindi: छेद (ched) — opening, hole
- Italian: apertura — opening, hole
- Japanese: 隙間 (sukima) — opening, hole
- Kaitag: ям (əm) — opening, hole
- Latin: apertūra — opening, hole
- Manx: towl — opening, hole
- Māori: pūaha — opening, hole
- Norwegian Bokmål: åpning — opening, hole
- Norwegian Nynorsk: opning — opening, hole
- Persian: روزنه (rowzane) — opening, hole
- Polish: otwór — opening, hole
- Polish: szpara — opening, hole
- Polish: szczelina — opening, hole
- Portuguese: abertura — opening, hole
- Romanian: deschizătură — opening, hole
- Russian: отве́рстие (otvérstije) — opening, hole
- Russian: проём (projóm) — opening, hole
- Slovene: odprtina — opening, hole
- Spanish: abertura — opening, hole
- Spanish: apertura — opening, hole
- Spanish: abierta — opening, hole
- Swedish: öppning — opening, hole
- Swedish: apertur — opening, hole
- Afrikaans: stralingsvlak — hole restricting the diameter of the lightpath through one plane
- Bulgarian: апертура (apertura) — hole restricting the diameter of the lightpath through one plane
- Chinese Mandarin: 光圈 (guāngquān) — hole restricting the diameter of the lightpath through one plane
- Czech: clona — hole restricting the diameter of the lightpath through one plane
- Danish: blænder — hole restricting the diameter of the lightpath through one plane
- Dutch: diafragma — hole restricting the diameter of the lightpath through one plane
- Dutch: opening — hole restricting the diameter of the lightpath through one plane
- Finnish: aukko — hole restricting the diameter of the lightpath through one plane
- German: Blende — hole restricting the diameter of the lightpath through one plane
- Hindi: द्वारक (dvārak) — hole restricting the diameter of the lightpath through one plane
- Hungarian: blende — hole restricting the diameter of the lightpath through one plane
- Hungarian: rekesz — hole restricting the diameter of the lightpath through one plane
- Japanese: 開口 (kaikō) — hole restricting the diameter of the lightpath through one plane
- Macedonian: отвор (otvor) — hole restricting the diameter of the lightpath through one plane
- Norwegian Bokmål: irisblender — hole restricting the diameter of the lightpath through one plane
- Norwegian Nynorsk: irisblendar — hole restricting the diameter of the lightpath through one plane
- Polish: przesłona — hole restricting the diameter of the lightpath through one plane
- Polish: przysłona — hole restricting the diameter of the lightpath through one plane
- Polish: apertura — hole restricting the diameter of the lightpath through one plane
- Portuguese: abertura — hole restricting the diameter of the lightpath through one plane
- Russian: затвор (zatvor) — hole restricting the diameter of the lightpath through one plane
- Russian: обтюратор (obtjurator) — hole restricting the diameter of the lightpath through one plane
- Russian: диафра́гма (diafrágma) — hole restricting the diameter of the lightpath through one plane
- Spanish: apertura — hole restricting the diameter of the lightpath through one plane
- Spanish: abertura — hole restricting the diameter of the lightpath through one plane
- Swedish: bländare — hole restricting the diameter of the lightpath through one plane
- Swedish: apertur — hole restricting the diameter of the lightpath through one plane
- Danish: blænder — diameter of the aperture
- Dutch: diafragma — diameter of the aperture
- Dutch: opening — diameter of the aperture
- Finnish: aukon halkaisija — diameter of the aperture
- French: ouverture — diameter of the aperture
- Georgian: სანათური (sanaturi) — diameter of the aperture
- German: Blendenzahl — diameter of the aperture
- Irish: cró — diameter of the aperture
- Macedonian: отвор (otvor) — diameter of the aperture
- Norwegian Bokmål: blenderåpning — diameter of the aperture
- Norwegian Nynorsk: blendaropning — diameter of the aperture
- Norwegian Nynorsk: blendarop — diameter of the aperture
- Polish: przysłona — diameter of the aperture
- Portuguese: abertura — diameter of the aperture
- Russian: диафра́гма (diafrágma) — diameter of the aperture
- Russian: апертура (apertura) — diameter of the aperture
- Slovene: apertura — diameter of the aperture
- Spanish: apertura — diameter of the aperture
- Spanish: abertura — diameter of the aperture
Real reading context