Definition of APERTURE

aperture

Meanings

Plural: apertures

Noun

  • a device that controls amount of light admitted
  • a natural opening in something
  • an man-made opening; usually small
  • A small or narrow opening, gap, slit, or hole.
  • A hole which restricts the diameter of the lightpath through one plane in an optical system.
  • 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.
  • 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.
  • The maximum angle between the two generatrices.

Origin / 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.

Scrabble Score: 10

aperture is a valid Scrabble (US) TWL word
aperture is a valid Scrabble Word in Merriam-Webster MW Dictionary
aperture is a valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 12

aperture is a valid Words With Friends word