The Collaborative International Dictionary of English v.0.48:

Stereotype \Ste"re*o*type\, n. [Stereo- + -type: cf. F.
   st['e]r['e]otype.]
   1. A plate forming an exact faximile of a page of type or of
      an engraving, used in printing books, etc.; specifically,
      a plate with type-metal face, used for printing.
      [1913 Webster]

   Note: A stereotype, or stereotypr plate, is made by setting
         movable type as for ordinary printing; from these a
         cast is taken in plaster of Paris, paper pulp, or the
         like, and upon this cast melted type metal is poured,
         which, when hardened, makes a solid page or column,
         from which the impression is taken as from type.
         [1913 Webster]

   2. The art or process of making such plates, or of executing
      work by means of them.
      [1913 Webster]

   Stereotype block, a block, usually of wood, to which a
      stereotype plate is attached while being used in printing.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stereotype \Ste"re*o*type\, v. t. [imp. & p. p. Stereotyped;
   p. pr. & vb. n. Stereotyping.] [Cf. F. st['e]r['e]otyper.]
   1. To prepare for printing in stereotype; to make the
      stereotype plates of; as, to stereotype the Bible.
      [1913 Webster]

   2. Fig.: To make firm or permanent; to fix.
      [1913 Webster]

            Powerful causes tending to stereotype and aggravate
            the poverty of old conditions.        --Duke of
                                                  Argyll (1887).
      [1913 Webster]

WordNet (r) 3.0 (2006):

stereotype
    n 1: a conventional or formulaic conception or image; "regional
         stereotypes have been part of America since its founding"
    v 1: treat or classify according to a mental stereotype; "I was
         stereotyped as a lazy Southern European" [syn:
         pigeonhole, stereotype, stamp]

Moby Thesaurus II by Grady Ward, 1.0:

88 Moby Thesaurus words for "stereotype":
   assimilate to, automatism, autotype, bad habit, balance, bed,
   characteristic, confirm, creature of habit, custom, damp, deep-dye,
   define, duplicate plate, electrotype, embed, engraft, engrave,
   entrench, equalize, equilibrize, establish, etch, even, fix,
   flatten, force of habit, found, ground, habit, habit pattern,
   habitude, harmonize, homogenize, impact, implant, impress, imprint,
   infix, ingrain, inscribe, jam, keyboard, level, linotype,
   locked-up page, lodge, make uniform, monotype, normalize, pack,
   palaeotype, pattern, peculiarity, plant, plastic plate, plate,
   practice, praxis, print, printing plate, printing surface,
   regularize, regulate, root, rubber plate, seat, second nature, set,
   set in, settle, smooth, stabilize, stamp, standardize,
   stereotyped behavior, stone, symmetrize, trick, typeform,
   uniformize, usage, use, way, wedge, wont, zincograph, zincotype