An Etymological Dictionary of Astronomy and Astrophysics

1. A quality, accomplishment, etc., that fits a person for some function, office, or the like.
   

   2. A circumstance or condition required by law or custom for getting, having, or exercising a right, holding an office, or the like.
      

   3. The act of qualifying; state of being qualified (Dictionary.com).

See also: → qualify; → -tion.