- The definition of an allergy is a sensitivity to a specific substance which causes a negative bodily reaction, such as sneezing, wheezing, itching or difficulty breathing.
Breaking out in hives when getting stung by a bee is an example of an allergy.
allergy definition by Webster's New World
- a hypersensitivity to a specific substance (such as a food, pollen, dust, etc.) or condition (as heat or cold) which in similar amounts or degrees is harmless to most people: it is manifested in a physiological disorder
- a strong aversion
Origin: German allergie ; from Classical Greek allos, other (see else) plush -ergeia, as in energeia (see energy)
allergy definition by American Heritage Dictionary
noun pl. al·ler·gies
- An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms. Common indications of allergy may include sneezing, itching, and skin rashes.
- Informal An adverse sentiment; antipathy: an allergy to cocktail parties.
Origin: German Allergie : Greek allos, other; see allo- + Greek ergon, action; see werg- in Indo-European roots.
allergy - Cultural Definition
A highly sensitive reaction of the body to certain substances, such as pollen, that are present in amounts that do not affect most people. Common indications of allergy include sneezing, skin rashes, itching, and runny nose.
allergy - Medical Definition
allergy - Science Definition