The Collaborative International Dictionary of English v.0.48:

Silver \Sil"ver\, v. t. [imp. & p. p. Silvered; p. pr. & vb.
   n. Silvering.]
   1. To cover with silver; to give a silvery appearance to by
      applying a metal of a silvery color; as, to silver a pin;
      to silver a glass mirror plate with an amalgam of tin and
      mercury.
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   2. To polish like silver; to impart a brightness to, like
      that of silver.
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            And smiling calmness silvered o'er the deep. --Pope.
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   3. To make hoary, or white, like silver.
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            His head was silvered o'er with age.  --Gay.
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