allergy
n//əˈlɜ(ɾ)dʒi//överkänslighet, allergi
(medicine, immunology, broadly) A disorder of the immune system causing adverse reactions to substances (allergens) not harmful to most and marked by the body's production of histamines and associated with atopy, anaphylaxis, and asthma; any condition of hypersensitivity to a substance.
(medicine, immunology, strictly) Specifically, hypersensitivity of class I in the modern classification thereof: the immunoglobulin E–mediated type.
(informal, figuratively) An antipathy, as toward a person or activity.