DictionaryfeverHigh body temperature
noun

fever

FEE-ver/ˈfiːvər/

An elevation of body temperature above its normal range.

She has a fever and stays home from work today.

A digital thermometer displays the brief functional reading39°C beside an adult resting with a light blanket; elevated body temperature, no dosage or treatment steps.
Etymology

Latin febris already meant “fever” and is related to fovere, “to warm, heat.” That connection emphasizes the raised body temperature that defines this sense.

In context

Scary Interesting9:03
symptoms appear like a common virus— high fever, chills, headache, and body aches.
The Deadliest Cave on Earth

More examples

  • The nurse checks his temperature to see if he has a fever.
  • Her fever goes down after she takes the medicine.
  • Children sometimes develop fevers when they have an infection.

Forms

fever · fevers

feverish adjective — Having or showing signs of fever.

Similar words

temperature
Can mean fever informally, especially in the phrase “a temperature.”