computer virus

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(ˈvaɪ rəs)

n., pl. -rus•es.
1. 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.
2. a disease caused by a virus.
3. a corrupting influence on morals or the intellect; poison.
4. a segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.
[1590–1600; < Latin vīrus slime, poison; akin to ooze2]
vi′rus•like`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend: virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computercomputer virus - a software program capable of reproducing itself and usually capable of causing great harm to files or other programs on the same computer; "a true virus cannot spread to another computer without human assistance"
malevolent program - a computer program designed to have undesirable or harmful effects
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
فيروس كمبيوتر
számítógépes vírus
počítačový vírus
References in periodicals archive ?
Computers system that display the following signs could be infected with a computer virus:
PromiseMark's 500,000 customers can now be alerted on their cell phone, pager or PDA with a PromiseGuard 911Alert when information on a potentially harmful computer virus becomes available.
Holland, Associated Press writer, "Computer Virus Hits Fed Agencies" (May 11, 2000).
Another close relative to the computer virus is the "Trojan Horse." True to its name, a Trojan Horse program performs an undesired action while pretending to do something else.
A computer virus, like the common cold, is highly contagious.
Even though it's not that difficult for those with basic programming skills to write malicious software, writing a really sophisticated computer virus requires some intimate knowledge of the operating system it is written to work within and the hardware it will be expected to encounter.
A computer virus is very similar to a biological virus.
A computer virus is a self-replicating computer program that spreads by attaching itself to executable files or system areas on diskettes.
A computer virus can cause any number of problems for a company and its computer applications.
Here are several precautions you can take to prevent computer virus attacks, but they all boil down to one thing: Isolate your machine.
A computer virus may get into your system and not destroy any data or programs.
There are also some other computer virus models [19-21] combined with network theory to investigate the impact of the network topology, the patch forwarding, and the network eigenvalue on the viral prevalence.

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