A Quick and Simple Dictionary

tolerance

1. Noun.  (uncountable, obsolete) The ability to endure pain or hardship; endurance. (defdate, 15th-19th c.) .
2. Noun.  (uncountable) The ability or practice of tolerating; an acceptance or patience with the beliefs, opinions or practices of others; a lack of bigotry. (defdate, from 18th c.) .
3. Noun.  (uncountable) The ability of the body (or other organism) to resist the action of a poison, to cope with a dangerous drug or to survive infection by an organism. (defdate, from 19th c.) .
4. Noun.  (countable) The variation or deviation from a standard, especially the maximum permitted variation in an engineering measurement. (defdate, from 20th c.) .
5. Noun.  (uncountable) The ability of the body to accept a tissue graft without rejection. (defdate, from 20th c.) .