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Definitions from the Web

Term: Aperture

Noun:

1. (Photography) The opening in a camera lens through which light passes to expose the film or image sensor, determining the amount of light that is captured. It plays a crucial role in controlling the depth of field and the brightness of the image.

- Sample sentence: The professional photographer adjusted the aperture on his camera to capture a sharp foreground subject while keeping the background beautifully blurred.

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2. (Optics) An opening or hole that allows light to pass through, particularly in optical devices such as microscopes, telescopes, or binoculars.

- Sample sentence: The telescope's aperture collected enough light to reveal the stunning details of distant galaxies.

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3. (Architecture) A small opening, usually decorative, in a wall or dome, serving either as a window or to allow air and light to enter a room.

- Sample sentence: The Gothic cathedral featured intricate stained glass apertures that illuminated the vast interior with vivid hues.

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Verb:

1. (Obsolete) To open wide; to expand or spread out.

- Sample sentence: The flowers apertured their petals in the early morning sunlight.

Note: The term "aperture" is most commonly used as a noun in photography and optics contexts.