a domesticated, usually red-eyed, and albinic variety of the polecat, used in Europe for driving rabbits and rats from their burrows.

black-footed ferret.

to drive out by using or as if using a ferret (often fol. by out )

to ferret rabbits from their burrows; to ferret out enemies.

to hunt with ferrets.

to hunt over with ferrets

to ferret a field.

to search out, discover, or bring to light (often fol. by out )

to ferret out the facts.

to harry, worry, or torment

His problems ferreted him day and night.

to search about.