Computing. A program or piece of code which when executed causes itself to be copied into other locations, and which is therefore capable of…

Computing. A program designed to sabotage a computer or computer network; spec. a self-duplicating program which can operate without becoming…

= virus, n. 2d.

Programs written with the intent of being disruptive or damaging to (the user of) a computer or other electronic device; viruses, worms, spyware…