Real Dictionary

allergic
a respiratory disorder, often of allergic origin, characterized by difficulty in breathing, wheezing, and a sense of constriction in the chest [...]
an air route, esp one that is fully equipped with emergency landing fields, navigational aids, etc [...]
If you have an allergic reaction to something, you become ill or get a rash when you eat it, smell it, or touch it.
of, relating to, having, or caused by an allergy [...]
the reaction of living tissue to injury or infection, characterized by heat, redness, swelling, and pain [...]
adjective: If you are allergic to something, you become ill or get a rash when you eat it, smell it, or touch it.