Fever (noun)

1. An abnormal condition of the body characterized by an increase in body temperature, sweating, and feeling hot, typically as a symptom of an infection or other disease.
2. An excessive feeling of excitement or passion.

Origin:

Middle english: from old french fevre, from latin febris "fever".

Examples:

1. She had a fever of 101 degrees.
2. The child has a fever and a sore throat.
3. The fever broke in the night and he felt better.
4. The city was in a fever of excitement before the concert.
5. He had a fever of enthusiasm for the project.