What is the meaning of Mongoose?

Any of several species of generalist predatory Carnivores in the family Herpestidae; the various species range in size from rats to large cats. The Indian mongoose is noted as a predator of venomous snakes, though other mongoose species have similar habits.

Any members of family Eupleridae of Malagasy mongooses, only distantly related to the Herpestidae, but resembling them in appearance and habits, with larger ears and ringed tails.

Source: wiktionary.org