Exception (noun)

1. An instance or case that is not conforming to the general rule.
2. An act or instance of making an exception.

Origin:

From middle english, from old french exception, from latin exceptiō ("exception, exclusion, a taking out, protest"), from exceptus, past participle of excipere ("to take out, except"), from ex- ("out") + capere ("to take").

Examples:

1. He made an exception for her.
2. She was the exception that proved the rule.
3. The company made an exception to its policy.
4. The rule has an exception for emergencies.
5. The only exception is that they are not allowed to leave the country.