Meaning & use

allergy

noun·Everyday

Last updated

UK/ˈælədʒi/
US/ˈælɜːrdʒi/

Meanings

  1. nouncountable

    A medical condition in which the body reacts badly to a substance that is harmless to most people.

    Grammar: Countable: an allergy, allergies. Followed by 'to': an allergy to nuts.

    Patterns

    • an allergy to something
    • have an allergy
    • develop an allergy

    She has a serious allergy to peanuts.

    He developed an allergy to dust as an adult.

    My allergies get worse in the spring.

  2. nouncountableinformalfigurative

    A strong dislike or unwillingness to accept something.

    Grammar: Usually singular and figurative: an allergy to change.

    Patterns

    • an allergy to something

    The company has a real allergy to risk.

    His allergy to criticism makes him hard to work with.

Word forms

pluralallergies

Common combinations

food allergy
Food allergies are common in young children.
allergy to
He has an allergy to penicillin.
allergy season
During allergy season, I take medicine every day.
develop an allergy
You can develop an allergy at any age.
severe allergy
A severe allergy can be life-threatening.

Synonyms and how they differ

intolerance
Intolerance is often used for digestive problems, such as lactose intolerance, rather than a true immune reaction.
sensitivity
Sensitivity is a broader word for reacting strongly to something, and may not be a medical allergy.

Word family

allergic adjective
Having an allergy; reacting badly to a substance.
allergen noun
A substance that causes an allergic reaction.
allergist noun
A doctor who specializes in treating allergies.

Commonly confused: allergy or allergy vs. allergen?

allergy vs allergy vs. allergen

An allergy is the condition; an allergen is the substance that causes it. Peanuts are an allergen; the reaction is an allergy.

Practice

He has an allergy ___ cats, so he can't visit our house.

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