Aperture: Definition and part of speech

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Aperture

  1. n. The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture.
  2. n. The act of opening.
  3. n. An opening; an open space; a gap, cleft, or chasm; a passage perforated; a hole; as, an aperture in a wall.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.

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