Main Entry: tol·er·ance

Pronunciation: \ˈtäl(-ə)-rən(t)s\

Function: noun

1 : the capacity of the body to endure or become less responsive to a substance (as a drug) or a physiological insult especially with repeated use or exposure <developed a tolerance to painkillers>
2 : the immunological state marked by unresponsiveness to a specific antigen