Definition of INFECTIOUS

infectious

Adjective Satellite

  • caused by infection or capable of causing infection

Adjective

  • easily spread; - Bertrand Russell
    • "fear is exceedingly infectious; children catch it from their elders"
  • of or relating to infection
    • "infectious hospital"
    • "infectious disease"

Adj

  • Caused by an agent that enters the host's body (such as a bacterium, virus, parasite, or prion); often, also, transmitted among hosts via any of various routes (for example, contact, droplet-borne, airborne, waterborne, foodborne, fomite-borne, or bloodborne).
  • Able to infect others; capable of transmitting pathogens.
  • Spreading quickly from one person to another.
  • Memorable and invoking excitement or interest.

Examples

  • Cancer is usually not infectious.
  • Despite feeling better, the patient is still infectious.
  • Her enthusiasm for work can be really infectious.
  • More infectious diseases like the flu are usually less potent.
  • Pop music is more infectious than elevator music.

Origin / Etymology

Borrowed from New Latin īnfectiōsus. By surface analysis, infect + -ious.

Synonyms

infective

Antonyms

noninfectious, non-infectious

Scrabble Score: 15

infectious: valid Scrabble (US) TWL Word
infectious: valid Scrabble Word in Merriam-Webster MW Dictionary
infectious: valid Scrabble Word in International Collins CSW Dictionary

Words With Friends Score: 18

infectious: valid Words With Friends Word