Im·pound v. t. [imp. & p. p. Impounded; p. pr. & vb. n. Impounding.] To shut up or place in an inclosure called a pound; hence, to hold in the custody of some authority such as police or a court; as, to impound stray cattle; to impound an illegally parked car; to impound a document for safe keeping.
  But taken and impounded as a stray,
  The king of Scots.   --Shak.
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  impounding
       n : placing private property in the custody of an officer of the
           law [syn: impoundment, internment, poundage]