Noun fever has 2 senses
  1. fever, febrility, febricity, pyrexia, feverishness - a rise in the temperature of the body; frequently a symptom of infection
    --1 is a kind of symptom
    --1 has particulars: hyperpyrexia
  2. fever - intense nervous anticipation; "in a fever of resentment"
    --2 is a kind of
    anticipation, expectancy
    --2 has particulars: buck fever; gold fever