virus: Meaning and Definition of
Pronunciation: (vī'rus), [key]
— pl. -rus•es.
- an ultramicroscopic (20 to 300 nm in diameter), metabolically inert, infectious agent that replicates only within the cells of living hosts, mainly bacteria, plants, and animals: composed of an RNA or DNA core, a protein coat, and, in more complex types, a surrounding envelope.
- a viral disease.
- a corrupting influence on morals or the intellect; poison.
- a segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.
- virus (Thesaurus)