tolerance

noun

• 1the ability or willingness to tolerate something, in particular the existence of opinions or behavior that one does not necessarily agree with:the tolerance of corruption an advocate of religious tolerance
• the capacity to endure continued subjection to something, especially a drug, transplant, antigen, or environmental conditions, without adverse reaction:the desert camel shows the greatest tolerance to dehydration species were grouped according to pollution tolerance various species of diatoms display different tolerances to acid
• diminution in the body’s response to a drug after continued use.

• 2an allowable amount of variation of a specified quantity, especially in the dimensions of a machine or part:250 parts in his cars were made to tolerances of one thousandth of an inch