The Collaborative International Dictionary of English v.0.48:

Primary \Pri"ma*ry\, n.; pl. Primaries.
   1. That which stands first in order, rank, or importance; a
      chief matter.
      [1913 Webster]

   2. A primary meeting; a caucus.
      [1913 Webster]

   3. (Zool.) One of the large feathers on the distal joint of a
      bird's wing. See Plumage, and Illust. of Bird.
      [1913 Webster]

   4. (Astron.) A primary planet; the brighter component of a
      double star. See under Planet.
      [1913 Webster]