| Noun | 1. | diskette - a small plastic magnetic disk enclosed in a stiff envelope with a radial slit; used to store data or programs for a microcomputer; "floppy disks are noted for their relatively slow speed and small capacity and low price"computer, computing device, computing machine, data processor, electronic computer, information processing system - a machine for performing calculations automatically magnetic disc, magnetic disk, disc, disk - (computer science) a memory device consisting of a flat disk covered with a magnetic coating on which information is stored |