Definitions
1.nounAn often domesticated mammal (Mustela putorius furo) rather like a weasel, descended from the polecat and often trained to hunt burrowing animals.
2.nounThe black-footed ferret, Mustela nigripes.
3.nounA diligent searcher.
4.verbTo hunt game with ferrets.
5.verb(by extension) To uncover and bring to light by searching; usually to ferret out.