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View synonyms for

infectious

[ in-fek-shuhs ]

adjective

  1. communicable by infection, as from one person to another or from one part of the body to another:

    infectious diseases.

    Synonyms:

  2. causing or communicating infection.
  3. tending to spread from one to another:

    infectious laughter.

  4. Law. capable of contaminating with illegality; exposing to seizure or forfeiture.
  5. Obsolete. diseased.


infectious

/ ɪˈɛʃə /

adjective

  1. (of a disease) capable of being transmitted Compare contagious
  2. (of a disease) caused by microorganisms, such as bacteria, viruses, or protozoa
  3. causing or transmitting infection
  4. tending or apt to spread, as from one person to another

    infectious mirth

  5. international law
    1. tainting or capable of tainting with illegality
    2. rendering liable to seizure or forfeiture
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

infectious

  1. Capable of causing infection.
  2. See Note at contagious
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Derived Forms

  • ˈڱ𳦳پdzܲԱ, noun
  • ˈڱ𳦳پdzܲ, adverb
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Other Word Forms

  • ·ڱtdzܲ· adverb
  • ·ڱtdzܲ·Ա noun
  • ԴDzi·ڱtdzܲ adjective
  • non·ڱtdzܲ· adverb
  • non·ڱtdzܲ·Ա noun
  • ܲi·ڱtdzܲ adjective
  • un·ڱtdzܲ· adverb
  • un·ڱtdzܲ·Ա noun
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Word History and Origins

Origin of infectious1

First recorded in 1535–45; infect(ion) + -ious
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Synonym Study

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Example Sentences

Examples have not been reviewed.

Measles has been confirmed in a Los Angeles County resident who recently returned from Texas, a state that is in the midst of an outbreak of the highly infectious disease, health officials said Friday.

From

But none would be as likely to come roaring back as measles, far and away the most infectious of the bunch.

From

She said Leah was a "happy-go-lucky person with a gorgeous, infectious smile".

From

But about three quarters of all human infectious diseases are zoonotic, including the majority of novel epidemics and pandemics in recent years, and there's overlap with the issue of thawing permafrost.

From

Foot and mouth disease is a highly infectious virus which causes blisters inside an animal's mouth and under their hooves, and can cause lameness and problems feeding.

From

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infectioninfectious anemia of horses