The Collaborative International Dictionary of English v.0.48:

Fever \Fe"ver\ (f[=e]"v[~e]r), n. [OE. fever, fefer, AS. fefer,
   fefor, L. febris: cf. F. fi[`e]vre. Cf. Febrile.]
   1. (Med.) A diseased state of the system, marked by increased
      heat, acceleration of the pulse, and a general derangement
      of the functions, including usually, thirst and loss of
      appetite. Many diseases, of which fever is the most
      prominent symptom, are denominated fevers; as, typhoid
      fever; yellow fever.
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   Note: Remitting fevers subside or abate at intervals;
         intermitting fevers intermit or entirely cease at
         intervals; continued or continual fevers neither remit
         nor intermit.
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   2. Excessive excitement of the passions in consequence of
      strong emotion; a condition of great excitement; as, this
      quarrel has set my blood in a fever.
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            An envious fever
            Of pale and bloodless emulation.      --Shak.
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            After life's fitful fever he sleeps well. --Shak.
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   Brain fever, Continued fever, etc. See under Brain,
      Continued, etc.

   Fever and ague, a form of fever recurring in paroxysms
      which are preceded by chills. It is of malarial origin.

   Fever blister (Med.), a blister or vesicle often found
      about the mouth in febrile states; a variety of herpes.

   Fever bush (Bot.), the wild allspice or spice bush. See
      Spicewood.

   Fever powder. Same as Jame's powder.

   Fever root (Bot.), an American herb of the genus
      Triosteum (Triosteum perfoliatum); -- called also
      feverwort and horse gentian.

   Fever sore, a carious ulcer or necrosis. --Miner.
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