- a large, bushy-tailed rodent, Neotoma cinerea, of North America, noted for carrying off small articles to store in its nest.
- a person who saves things that are not needed or used but that may have personal or other value.
- an old prospector or guide.
- to save in the manner of a pack rat: I’m looking through the stuff my grandpa pack-ratted away in the attic.
- any rat of the genus Neotoma, of W North America, having a long tail that is furry in some species: family Cricetidae
