Real Dictionary

ferret
countable noun: A ferret is a small, fierce animal which is used for hunting rabbits and rats.
verb: If you ferret about for something, you look for it in a lot of different places or in a place where it is hidden.

ferret in American English 1
a narrow ribbon of cotton, wool, silk, etc.
noun: a domesticated, usually red-eyed, and albinic variety of the polecat, used in Europe for driving rabbits and rats from their burrows

ferret in American English 2
a small, domesticated European polecat with pink eyes and yellowish fur, easily tamed for hunting rabbits, rats, etc.
to force out of hiding with or as if with a ferret
to hunt with ferrets
noun: a narrow tape or ribbon, as of silk or cotton, used for binding, trimming, etc

ferret in British English 1
noun: a domesticated albino variety of the polecat Mustela putorius, bred for hunting rats, rabbits, etc

ferret in British English 2
noun: silk binding tape