APERTURE • DICCIONARIO INGLES.COM • Definition of Aperture

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/ˈæpərtʃər/ Listen

noun

Aperture n.

The act of opening. (Obs.)

An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall. "An aperture between the mountains." "The back aperture of the nostrils."

(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. 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° aperture.

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Etymology of 'Aperture'

Collaborative International Dictionary of English 0.48

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"Aperture" Quotes from Famous Books

... had to search for, and with outstretched hand he swam silently along the solid masonry, feeling for that aperture just above watermark which he had seen before the daylight faded. It took him some little time to find it, but at last it was discovered, and with a muttered word of command to the men who silently followed in his wake, he drew himself slowly out of the water, to find himself ...

— In the Days of Chivalry • Evelyn Everett-Green

... the west, is on a hill the other side of the railway. It has some pretty modern cottages by a pond and shading elm-trees; a post-office also, with the smallest possible aperture for introducing letters to the notice of the post-mistress within. The church has some quaint features; there are a number of oddly shaped lancet windows, a curiously carved boss in the groining of the tower, and a strange arrangement ...

— Highways and Byways in Surrey • Eric Parker

... whose chain hung against the iron grating which fronted the humble abode. As it sounded, an emaciated figure appeared under the arched aperture and a sonorous voice cried out in Arabic, ...

— There was a King in Egypt • Norma Lorimer

... contrary to custom, dressed early and went upon deck: he went forward to the gangway to view the island. He beheld a kind of village surrounded by numerous barren hills towering to the clouds. Every platform, every aperture, the brow of every hill was planted with cannon. The Emperor viewed the prospect through his glass. His countenance underwent no change. He soon left the deck; and sending for Las Cases, proceeded to his day's work. The Admiral, who had gone ashore very ...

— The Memoirs of Napoleon Bonaparte • Bourrienne, Constant, and Stewarton

... the confusion I had not been able to recall Job's instructions in opening the latch; at last I remembered, and pressed, the screw—the latch rose—I opened the door; but not wide enough to scape through the aperture. The ruffians saw my escape at hand. "Rush the b—cove! rush him!" cried the loud voice of one behind; and at the word, Fib was thrown forwards upon the extended edge of my blade; scarcely with an effort of my own arm, the sword entered ...

— Pelham, Complete • Edward Bulwer-Lytton

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