a kind of arboreal rodent having a long bushy tail
"The squirrel scampered up the oak tree, its long bushy tail fanning out behind it as it chased after an acorn."
the fur of a squirrel
"The soft, russet-colored squirrel on his shoulder scratched against his cheek as he walked through the autumn leaves."
Any of the rodents of the family Sciuridae distinguished by their large bushy tail.
"The child chased a squirrel across the park, marveling at how its large bushy tail moved as it scampered up the oak tree."
To store in a secretive manner, to hide something for future use
"The thief tried to squirrel away his stolen money before the police arrived."
The word squirrel comes from the Old French escurel, which originally meant "shadow-tail" because of its bushy tail that looks like a shadow. This term replaced an older English word derived from Old English for acorn.