What does allergy mean?

Definitions for allergy
ˈæl ər dʒial·ler·gy

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

Princeton's WordNet

  1. allergy, allergic reactionnoun

    hypersensitivity reaction to a particular allergen; symptoms can vary greatly in intensity


  1. allergynoun

    A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma.

  2. allergynoun

    Any condition of hypersensitivity to a substance.

  3. allergynoun

    Altered susceptibility to a first treatment as exhibited in reaction to a subsequent one.

  4. allergynoun

    An antipathy, as toward a person or activity.

    He is allergic to reality TV.

  5. Etymology: From Allergie. Coined by Austrian pediatrician Clemens von Pirquet in 1906 from ἄλλος + ἔργον, on the model of Energie.


  1. allergy

    An allergy is an abnormal reaction of the body's immune system to typically harmless substances which are considered as threats. These substances, known as allergens, can include certain foods, pollen, dust mites, mold spores, pet dander, or medicines. Allergic reactions can range from mild symptoms such as itching, sneezing or skin rashes, to severe and potentially life-threatening conditions like anaphylaxis.


  1. Allergy

    An allergy is a hypersensitivity disorder of the immune system. Allergic reactions occur when a person's immune system reacts to normally harmless substances in the environment. A substance that causes a reaction is called an allergen. These reactions are acquired, predictable, and rapid. Allergy is one of four forms of hypersensitivity and is formally called type I hypersensitivity. Allergic reactions are distinctive because of excessive activation of certain white blood cells called mast cells and basophils by a type of antibody called Immunoglobulin E. This reaction results in an inflammatory response which can range from uncomfortable to dangerous. Mild allergies like hay fever are very common in the human population and cause symptoms such as red eyes, itchiness, and runny nose, eczema, hives, or an asthma attack. Allergies can play a major role in conditions such as asthma. In some people, severe allergies to environmental or dietary allergens or to medication may result in life-threatening reactions called anaphylaxis. Food allergies, and reactions to the venom of stinging insects such as wasps and bees are often associated with these severe reactions.

Anagrams for allergy »

  1. gallery

  2. largely

  3. regally

How to pronounce allergy?

How to say allergy in sign language?


  1. Chaldean Numerology

    The numerical value of allergy in Chaldean Numerology is: 9

  2. Pythagorean Numerology

    The numerical value of allergy in Pythagorean Numerology is: 8

Examples of allergy in a Sentence

  1. Lina Hidalgo:

    But if Anthony Fauci're not going to do National Institute of Allergy.

  2. Ujwala Kaza:

    Everyone is a bit different, so treatment has to be tailored to the individual, in general, if there are any factors that are found to be triggers, the first step is to avoid those triggers. For example, if that adorable adopted cat who makes you sneeze sleeps on your pillow most nights, it may be a good idea to convince her to sleep in a different room. If you have a chronic postnasal drip from an allergy to pollen or from a deviated septum, its important to treat those issues as well.

  3. Xiaobin Wang:

    Our finding is that epigenetics appear to be a mechanism to regulate whether someone can develop the food allergy, gene codes are relatively stable, but the epigenetic part is dynamic.

  4. Alkis Togias:

    From our perspective as an agency that is responsible for research in the field, what it tells us is that we need to improve on the methods for treating food allergy, especially peanut allergy.

  5. Tucker Carlson:

    PETA's discovered the National Institute of Allergy and Infectious Diseases spent more than 200 grand on a proposed experiment that would ‘ subject real male rhesus monkeys to feminizing hormone therapy to see whether that makes them more susceptible to HIV to help transgender women,' it couldn't get uglier.

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Translations for allergy

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"allergy." Definitions.net. STANDS4 LLC, 2024. Web. 13 Jul 2024. <https://www.definitions.net/definition/allergy>.

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    incapable of being atoned for
    A pecuniary
    B inexpiable
    C motile
    D tenebrous

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