Chipmunk \Chip"munk`\, n. [Indian name.] (Zo["o]l.) A squirrel-like animal of the genus {Tamias}, sometimes called the {striped squirrel}, {chipping squirrel}, {ground squirrel}, {hackee}. The common species of the United States is the {Tamias striatus}. [Written also {chipmonk}, {chipmuck}, and {chipmuk}.]