Source : Webster's Revised Unabridged Dictionary (1913)

Sex \Sex\, n. [L. sexus: cf. F. sexe.]
   1. The distinguishing peculiarity of male or female in both
      animals and plants; the physical difference between male
      and female; the assemblage of properties or qualities by
      which male is distinguished from female.

   2. One of the two divisions of organic beings formed on the
      distinction of male and female.

   3. (Bot.)
      (a) The capability in plants of fertilizing or of being
          fertilized; as, staminate and pistillate flowers are
          of opposite sexes.
      (b) One of the groups founded on this distinction.

   {The sex}, the female sex; women, in general.