Definitions of virus

  1. ( virology) ultramicroscopic infectious agent that replicates itself only within cells of living hosts; many are pathogenic; a piece of nucleic acid ( DNA or RNA) wrapped in a thin coat of protein
  2. 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"
  3. a harmful or corrupting agency; " bigotry is a virus that must not be allowed to spread"; " the virus of jealousy is latent in everyone"
  4. The special contagion, inappreciable to the senses and acting in exceedingly minute quantities, by which a disease is introduced into the organism and maintained there.
  5. Fig.: Any morbid corrupting quality in intellectual or moral conditions; something that poisons the mind or the soul; as, the virus of obscene books.
  6. Contagious or poisonous matter, as of specific ulcers, the bite of snakes, etc.; - applied to organic poisons.
  7. Poison; the poisonous matter produced by disease, containing the germs that cause the disease; hence, anything that poisons the mind or soul, as treachery.
  9. A slimy liquid: contagious or poisonous matter ( as of ulcers, etc.): the poison which causes infection: any foul, hurtful matter.
  10. Contagious matter from ulcers, & c.; poison.
  11. A morbid poison that is the means of communioating infectious disease.
  12. Active or contagious matter of an ulcer, pustule, & c.; a poisonous principle or matter which engenders a zymotic disease.
  13. The contagious or poisonous matter of an ulcer or a pustule, & c.; any foul hurtful matter.