to shut up in a pound or other enclosure, as a stray animal. to confine within an enclosure or within limits: water impounded in a reservoir. to seize and retain in custody of the law, as a document for evidence.

What impound means?

transitive verb. 1a : to shut up in or as if in a pound : confine. b : to seize and hold in the custody of the law. c : to take possession of she was dismissed and her manuscript impounded— Jonathan Weiner. 2 : to collect and confine (water) in or as if in a reservoir.

What does it mean to impound a document?

to seize (chattels, etc) by legal right. to take possession of (a document, evidence, etc) and hold in legal custody.