Meaning of “allergy” in the English Dictionary

american-english dictionary

"allergy" in American English

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allergynoun [ C ]

us /ˈæl·ər·dʒi/

a condition that causes illness when someone eats certain foods or touches or breathes in certain substances:

Your rash is caused by an allergy to peanuts.
adjective us /əˈlɜr·dʒɪk/

I’m allergic to cats.

(Definition of “allergy” from the Cambridge Academic Content Dictionary © Cambridge University Press)