Allergy
Definition 1 of 2
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Medical Condition
Allergy refers to a medical issue involving immune response, not just any dislike or discomfort. Because of his allergy to cats, he can't visit homes with pets.
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Serious Reactions
Some allergies can lead to life-threatening situations, so it's a serious word, not to be used lightly. She carries an epinephrine pen due to her allergy to bee stings.
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Specific Triggers
An allergy usually has a specific cause, like certain foods, animals, or materials. His allergy to wool makes shopping for sweaters difficult.