Definitions

1. noun

A predisposition to develop allergic diseases, especially atopic dermatitis, hay fever, or asthma, due to an overactive immune system.

“She has a family history of atopy, so her doctor is monitoring her symptoms closely.”

2. noun

A condition characterized by an exaggerated or inappropriate immune response to harmless antigens or allergens.

“The researchers studied the mechanisms underlying atopy in patients with allergic rhinitis.”