Aperture Ap"er*ture (?; 135), n. [L. apertura, fr. aperire. See {Aperient}.] 1. The act of opening. [Obs.] [1913 Webster]

2. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. [1913 Webster]

An aperture between the mountains. --Gilpin. [1913 Webster]

The back aperture of the nostrils. --Owen. [1913 Webster]

3. (Opt.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture. [1913 Webster]

Note: The aperture of microscopes is often expressed in degrees, called also the angular aperture, which signifies the angular breadth of the pencil of light which the instrument transmits from the object or point viewed; as, a microscope of 100[deg] aperture. [1913 Webster]

The Collaborative International Dictionary of English. 2000.


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  • aperture — [ apɛrtyr ] n. f. • 1916; « ouverture » archit. XVIe; lat. apertura, de aperire « ouvrir » ♦ Phonét. Écartement des organes au point d articulation d un phonème pendant la tenue. Degrés d aperture des voyelles. ● aperture nom féminin (latin… …   Encyclopédie Universelle

  • Aperture — (BE: [ˈæpətʃə]; AmE: [ˈæpɚtʃʊɹ]) bezeichnet: Aperture (Software), eine Bildverwaltungssoftware Aperture (Softwarehersteller), einen Softwarehersteller Aperture (Zeitschrift), eine US amerikanische Fachzeitschrift für Fotografie Siehe auch:… …   Deutsch Wikipedia

  • aperture — aperture, interstice, orifice denote an opening allowing passage through or in and out. Aperture is applied especially to any opening in a thing that otherwise presents a solid or closed surface or structure; it may be applied both to an opening… …   New Dictionary of Synonyms

  • aperture — index loophole, outlet, portal, rift (gap), split Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • aperture — (n.) early 15c., from L. apertura an opening, from apertus, pp. of aperire to open (see OVERT (Cf. overt)) …   Etymology dictionary

  • aperture — [n] hole breach, break, chasm, chink, cleft, crack, cut, eye, fissure, gap, gash, interstice, opening, orifice, outlet, passage, perforation, pinhole, puncture, rift, rupture, slash, slit, slot, space, vent; concept 757 …   New thesaurus

  • aperture — ► NOUN 1) an opening, hole, or gap. 2) the variable opening by which light enters a camera. ORIGIN Latin apertura, from aperire to open …   English terms dictionary

  • aperture — [ap′ər chər] n. [L apertura < apertus, pp. of aperire, to open < IE * ap wer , to uncover < base * ap(o) away + * wer to close, cover > WARN] 1. an opening; hole; gap 2. the opening, or the diameter of the opening, in a camera,… …   English World dictionary

  • Aperture — For other uses, see Aperture (disambiguation). f stops demonstrated on a lens …   Wikipedia

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