Medical Definition of allergy
1: altered bodily reactivity (as hypersensitivity) to an antigen in response to a first exposure <his bee-venom allergy may render a second sting fatal>
2: exaggerated or pathological reaction (as by sneezing, respiratory embarrassment, itching, or skin rashes) to substances, situations, or physical states that are without comparable effect on the average individual
3: medical practice concerned with allergies
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Dictionary: Definition of "allergy" Thesaurus: All synonyms and antonyms for "allergy" Spanish Central: Translation of "allergy" Nglish: Translation of "allergy" for Spanish speakers Britannica English: Translation of "allergy" for Arabic speakers Britannica.com: Encyclopedia article about "allergy"
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