[n] Allergy meaning (immune system reaction) with 5 examples

[n] Allergy
/ˈæl.ɚ.dʒi/
(immune system reaction)
A condition in which the immune system reacts abnormally to a foreign substance.
(Allergies can cause symptoms like sneezing, itching, and swelling.)
Example sentences:
She has an allergy to peanuts.
His pollen allergy gets worse in the spring.
(Pollen : powder by part of a flower)
They carried an EpiPen for their severe allergy.
The doctor diagnosed him with a dust allergy.
Allergy symptoms can be managed with medication.