Affair (noun)

1. A matter or activity that is of concern or interest.
2. A matter or situation that is under consideration or discussion.
3. A romantic or sexual relationship.
4. An event or happening that is of public interest.
5. A matter or activity that is of concern or interest to someone.

Origin:

Late middle english: from old french afaire, from a faire "to do".

Examples:

1. The company's financial affairs are in order.
2. He is having an affair with his secretary.
3. The affair was a scandal in the community.
4. The affair was a major event in the city.
5. She is having an affair with her co-worker.