laptop

noun

1. a portable computer, usually battery-powered, small enough to rest on the user’s lap and having a screen that closes over the keyboard like a lid.Compare tablet(def 6).

noun

1. a personal computer that is small and light enough to be operated on the user’s lapCompare palmtop computer

also lap-top, as a type of portable computer, 1984, from lap (n.) + top (1), on model of desktop. A portable, compact personal computer that can run on a battery.