The Collaborative International Dictionary of English v.0.48:

Generic \Ge*ner"ic\, Generical \Ge*ner"ic*al\, a. [L. genus,
   generis, race, kind: cf. F. g['e]n['e]rique. See Gender.]
   [1913 Webster]
   1. (Biol.) Pertaining to a genus or kind; relating to a
      genus, as distinct from a species, or from another genus;
      as, a generic description; a generic difference; a generic
      name. [WordNet sense 1]
      [1913 Webster]

   2. Very comprehensive; pertaining or appropriate to large
      classes or their characteristics; -- opposed to
      specific. [WordNet sense 3]
      [1913 Webster]

   3. (Commerce) Not protected by trademark; -- used especially
      of the names of medications; as, a generic drug; the
      generic name of Rogaine is minoxidil. [WordNet sense 2]
      [PJC]

   Note: Since patented medications cannot be sold except under
         license from the patentee, medication which is still
         under patent is not typically sold as a generic drug,
         i.e., sold under its generic name, though it can be
         referred to by its generic name.
         [PJC]

WordNet (r) 3.0 (2006):

generic
    adj 1: relating to or common to or descriptive of all members of
           a genus; "the generic name"
    2: (of drugs) not protected by trademark; "`Acetaminophen' is
       the generic form of the proprietary drug `Tylenol'"
    3: applicable to an entire class or group; "is there a generic
       Asian mind?"
    n 1: a wine that is a blend of several varieties of grapes with
         no one grape predominating; a wine that does not carry the
         name of any specific grape [syn: generic, generic wine]
         [ant: varietal, varietal wine]
    2: any product that can be sold without a brand name

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "generic":
   abstract, bland, broad, collective, common, featureless, general,
   generalized, indefinite, indeterminate, nebulous, neutral,
   nonspecific, uncharacterized, undifferentiated, universal,
   unspecified, vague, wide