Definitions

1. noun

A state of hypersensitivity or intolerance to a particular substance, such as pollen, dust, or certain foods, which can cause an allergic reaction.

“She suffers from severe allergies and must avoid exposure to dust mites.”

2. noun

A type of immune system disorder characterized by an overreaction to foreign substances.

“His doctor diagnosed him with an allergy, specifically an allergy to shellfish.”