- 1An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host: the hepatitis B virus [as modifier]: a virus infectionMore example sentences
- When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane.
- Such viruses enter the host cell and then rapidly multiply inside the cell before killing it.
- Bacteriophages fit the definition of parasite to a T. In many cases new viruses multiply inside a host until the bacterium simply rips apart.
- 1.1An infection or disease caused by a virus: I’ve had a virusMore example sentences
- The most recent problem has been a virus and she comes into the tournament short on match play.
- Been off sick with a virus for like AGES!!!
- After some months when it became clear that my malady wasn't disappearing like a good virus, this burden fell on my husband.
- 2 (also computer virus) A piece of code which is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.More example sentences
- A computer virus or spyware application is sending us automated requests, and it appears that your computer or network has been infected.
- Hewlett-Packard has distributed printer drivers corrupted by a computer virus.
- A computer virus which affected the operation of Google yesterday is spreading like wildfire.
late Middle English (denoting the venom of a snake): from Latin, literally 'slimy liquid, poison'. The earlier medical sense, superseded by the current use as a result of improved scientific understanding, was 'a substance produced in the body as the result of disease, especially one capable of infecting others'.