An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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definition
  هدارش  
hedâreš
Fr.: définition  

  1. The act or process of establishing some value or condition with precision.

  2. The formal statement of the meaning or significance of a word, concept, etc.

  3. Optics: The clarity, fidelity, sharpness, and brilliancy of an image formed by an optical system.

See also: Verbal noun of → define.