- any of numerous arboreal, bushy-tailed rodents of the genus Sciurus, of the family Sciuridae.
- any of various other members of the family Sciuridae, as the chipmunks, flying squirrels, and woodchucks.
- the meat of such an animal.
- the pelt or fur of such an animal: a coat trimmed with squirrel.
- to store or hide (money, valuables, etc.), usually for the future (often followed by away): I've squirreled away a few dollars for an emergency.
- any arboreal sciurine rodent of the genus Sciurus, such as S. vulgaris (red squirrel) or S. carolinensis (grey squirrel), having a bushy tail and feeding on nuts, seeds, etc
- any other rodent of the family Sciuridae, such as a ground squirrel or a marmot
- the fur of such an animal
- a person who hoards things
- to store for future use; hoard
