What is "impounded"

Impound \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.

vb. (en-past of: impound)