allergy
Americannoun
plural
allergies-
an abnormal reaction of the body to a previously encountered allergen introduced by inhalation, ingestion, injection, or skin contact, often manifested by itchy eyes, runny nose, wheezing, skin rash, or diarrhea.
-
hypersensitivity to the reintroduction of an allergen.
-
Informal. a strong dislike or aversion, as toward a person or activity.
He has an allergy to hard work.
noun
-
a hypersensitivity to a substance that causes the body to react to any contact with that substance. Hay fever is an allergic reaction to pollen
-
informal aversion
he has an allergy to studying
-
An abnormally high immunologic sensitivity to certain stimuli such as drugs, foods, environmental irritants, microorganisms, or physical conditions, such as temperature extremes. These stimuli act as antigens, provoking an immunological response involving the release of inflammatory substances, such as histamine, in the body. Allergies may be innate or acquired in genetically predisposed individuals. Common symptoms include sneezing, itching, and skin rashes, though in some individuals symptoms can be severe.
-
See also anaphylactic shock
Etymology
Origin of allergy
1910–15; < Greek áll ( os ) other + -ergy < Greek -ergia, equivalent to érg ( on ) activity + -ia -y 3
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
On screen, the assessment begins with Dr. Al-Hashimi checking to see if Ilana has any injuries that need immediate attention and getting an intake of prescription medications and any known allergies to medications.
From Los Angeles Times
A single nasal spray vaccine could protect against all coughs, colds and flus, as well as bacterial lung infections, and may even ease allergies, say US researchers.
From BBC
Reduce evening salt and alcohol, treat allergies properly, prioritise sleep and slightly elevate your head at night.
From BBC
Another doctor, who ruled out allergies, also said it must be perimenopause.
All parents will provide a list of rules, allergies, and emergency contact information.
From Literature
![]()
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.