- any of a group of submicroscopic entities consisting of a single nucleic acid chain surrounded by a protein coat and capable of replication only within the cells of living organisms: many are pathogenic
- informal a disease caused by a virus
- any corrupting or infecting influence
- an unauthorized program that inserts itself into a computer system and then propagates itself to other computers via networks or disks; when activated it interferes with the operation of the computer
WordReference Random House Learner's Dictionary of American English © 2020
vi•rus /ˈvaɪrəs/USA pronunciation n.[countable], pl. -rus•es.WordReference Random House Unabridged Dictionary of American English © 2020
- Microbiologya very small living thing causing infection, which reproduces only within the cells of living hosts, mainly bacteria, plants, and animals.
- Pathology, Informal Termsa disease caused by a virus:was ill from a virus.
- a corrupting idea or thought or a harmful influence on morals or the intellect.
- Computinga part of a computer program that is planted illegally in another program, often to damage or shut down a system or network.
vi•rus (vī′rəs),USA pronunciation n., pl. -rus•es.
- Microbiologyan 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.
- Pathology, Informal Terms[Informal.]a viral disease.
- a corrupting influence on morals or the intellect;
- Computinga segment of self-replicating code planted illegally in a computer program, often to damage or shut down a system or network.
- Latin vīrus slime, poison; akin to ooze2
Collins Concise English Dictionary © HarperCollins Publishers::
virus /ˈvaɪrəs/ n ( pl -ruses)
'virus' also found in these entries:
A.R.V. - AIDS - AIDS virus - AIDS-related complex - AIDS-related virus - ARC - Asian flu - Burkitt's lymphoma - CD4 - DNA virus - EBV - Ebola virus - Elisa - Epstein-Barr virus - FeLV - HIV - HPV - HTLV - Hendra - Jenner - T-lymphocyte - Tamiflu - adenovirus - antibody - arbovirus - arenavirus - attenuate - attenuation - avianize - bacteriophage - bird flu - bug - capsid - chickenpox - coat protein - coital exanthema - computer virus - contagium - coronavirus - cowpox - coxsackievirus - curly top - cytomegalovirus - delta virus - distemper - distemperoid - echovirus - enation - encephalitis - enterovirus