What does infection mean?

Definitions for infection
ɪnˈfɛk ʃənin·fec·tion

This dictionary definitions page includes all the possible meanings, example usage and translations of the word infection.

Princeton's WordNet

  1. infectionnoun

    the pathological state resulting from the invasion of the body by pathogenic microorganisms

  2. infectionnoun

    (phonetics) the alteration of a speech sound under the influence of a neighboring sound

  3. infectionnoun

    (medicine) the invasion of the body by pathogenic microorganisms and their multiplication which can lead to tissue damage and disease

  4. infection, contagion, transmissionnoun

    an incident in which an infectious disease is transmitted

  5. contagion, infectionnoun

    the communication of an attitude or emotional state among a number of people

    "a contagion of mirth"; "the infection of his enthusiasm for poetry"

  6. infectionnoun

    moral corruption or contamination

    "ambitious men are led astray by an infection that is almost unavoidable"

  7. infectionnoun

    (international law) illegality that taints or contaminates a ship or cargo rendering it liable to seizure


  1. Infectionnoun

    A localized area of tissue which is inflamed by growth of microorganisms; as, he has an infection in his finger.


  1. infectionnoun

    The act or process of infecting.

  2. infectionnoun

    An uncontrolled growth of harmful microorganisms in a host.

Samuel Johnson's Dictionary

  1. Infectionnoun

    Contagion; mischief by communication; taint; poison.

    Etymology: infection, Fr. infectio, Latin.

    Infection is that manner of communicating a disease by some effluvia, or particles which fly off from distempered bodies, and mixing with the juices of others, occasion the same disorders as in the bodies they came from John Quincy.

    What a strange infection
    Is fall'n into thy ear! William Shakespeare, Cymbeline.

    The blessed gods
    Purge all infections from our air, whilst you
    Do climate here. William Shakespeare, Winter's Tale.

    Vouchsafe, diffus'd infection of a man,
    For these known evils but to give me leave,
    By circumstance, to curse thy cursed self. William Shakespeare, R. III.

    Lest that th' infection of his fortune take
    Like hold on thee. William Shakespeare, King Lear.

    The transmission or emission of the thinner and more airy parts of bodies, as in odours and infections, is, of all the rest, the most corporeal; but withal there be a number of those emissions, both wholesome and unwholesome, that give no smell at all. Francis Bacon, Natural History.


  1. Infection

    An infection is the invasion of tissues by pathogens, their multiplication, and the reaction of host tissues to the infectious agent and the toxins they produce. An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection. Infections can be caused by a wide range of pathogens, most prominently bacteria and viruses. Hosts can fight infections using their immune system. Mammalian hosts react to infections with an innate response, often involving inflammation, followed by an adaptive response. Specific medications used to treat infections include antibiotics, antivirals, antifungals, antiprotozoals, and antihelminthics. Infectious diseases resulted in 9.2 million deaths in 2013 (about 17% of all deaths). The branch of medicine that focuses on infections is referred to as infectious disease.

Webster Dictionary

  1. Infectionnoun

    the act or process of infecting

  2. Infectionnoun

    that which infects, or causes the communicated disease; any effluvium, miasm, or pestilential matter by which an infectious disease is caused

  3. Infectionnoun

    the state of being infected; contamination by morbific particles; the result of infecting influence; a prevailing disease; epidemic

  4. Infectionnoun

    that which taints or corrupts morally; as, the infection of vicious principles

  5. Infectionnoun

    contamination by illegality, as in cases of contraband goods; implication

  6. Infectionnoun

    sympathetic communication of like qualities or emotions; influence

  7. Etymology: [Cf. F. infection, L. infectio a dyeing.]


  1. Infection

    Infection is the invasion of a host organism's bodily tissues by disease-causing organisms, their multiplication, and the reaction of host tissues to these organisms and the toxins they produce. Infections are caused by microorganisms such as viruses, prions, bacteria, and viroids, and larger organisms like macroparasites and fungi. Hosts can fight infections using their immune system. Mammalian hosts react to infections with an innate response, often involving inflammation, followed by an adaptive response. Pharmaceuticals can also help fight infections. The branch of medicine that focuses on infections and pathogens is infectious disease medicine.

U.S. National Library of Medicine

  1. Infection

    Invasion of the host organism by microorganisms that can cause pathological conditions or diseases.

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'infection' in Spoken Corpus Frequency: #3517

  2. Nouns Frequency

    Rank popularity for the word 'infection' in Nouns Frequency: #1263

How to pronounce infection?

How to say infection in sign language?


  1. Chaldean Numerology

    The numerical value of infection in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of infection in Pythagorean Numerology is: 5

Examples of infection in a Sentence

  1. Priya Soni:

    There is no other respiratory virus that we know, that affects adults so much more severely than infants, for example, when a child gets a viral infection there are usually more intense symptoms, accompanied by high fevers. In the case of COVID- 19, its the adults who are getting the high fevers, having severe complications and even dying.

  2. Du Plessis:

    What really matters is whether there is evidence of changes in the brain to suggest injury in the context of a proven viral infection in the mother, that is where MRI is the gold standard for picking up changes in the brain, even though it has limitations in terms of availability and cost.

  3. The CDC:

    Although how we understand transmission occurs has shifted, the ways to prevent infection with this virus have not, all prevention measures that CDC recommends remain effective for these forms of transmission.

  4. Andrew Kung:

    Even in that setting, we found that just half of the time when a caregiver was positive did the kid also test positive, this suggests that there is something about kids that makes them less susceptible not just to the development of symptoms but to the infection itself.

  5. Anthony Fauci:

    Obviously, the message should be that we should try as best as we can to avoid infection. No matter who you are, how old you are, or what your underlying condition is, we should not trivialize it.

Popularity rank by frequency of use


Translations for infection

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"infection." Definitions.net. STANDS4 LLC, 2023. Web. 28 May 2023. <https://www.definitions.net/definition/infection>.

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    weak or sickly person especially one morbidly concerned with his or her health
    • A. valetudinarian
    • B. bonzer
    • C. tenebrous
    • D. commensal

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