The Collaborative International Dictionary of English v.0.48:

Pewter \Pew"ter\ (p[=u]"t[~e]r), n. [OE. pewtyr, OF. peutre,
   peautre, piautre: cf. D. peauter, piauter, It. peltro, Sp. &
   Pg. peltre, LL. peutreum, pestrum. Cf. Spelter.]
   1. A hard, tough, but easily fusible, alloy, originally
      consisting of tin with a little lead, but afterwards
      modified by the addition of copper, antimony, or bismuth.
      [1913 Webster]

   2. Utensils or vessels made of pewter, as dishes, porringers,
      drinking vessels, tankards, pots.
      [1913 Webster]

   Note: Pewter was formerly much used for domestic utensils.
         Inferior sorts contain a large proportion of lead.
         [1913 Webster]

WordNet (r) 3.0 (2006):

pewter
    n 1: any of various alloys of tin with small amounts of other
         metals (especially lead)

Moby Thesaurus II by Grady Ward, 1.0:

35 Moby Thesaurus words for "pewter":
   aureate, brass, brassy, brazen, bronze, bronzy, copper, coppery,
   cupreous, cuprous, ferrous, ferruginous, gilt, gold, gold-filled,
   gold-plated, golden, iron, ironlike, lead, leaden, mercurial,
   mercurous, nickel, nickelic, nickeline, pewtery, quicksilver,
   silver, silver-plated, silvery, steel, steely, tin, tinny