Source : Webster's Revised Unabridged Dictionary (1913)

Ague \A"gue\, v. t. [imp. & p. p. {Agued}.]
   To strike with an ague, or with a cold fit. --Heywood.

Ague \A"gue\, n. [OE. agu, ague, OF. agu, F. aigu, sharp, OF.
   fem. ague, LL. (febris) acuta, a sharp, acute fever, fr. L.
   acutus sharp. See {Acute}.]
   1. An acute fever. [Obs.] ``Brenning agues.'' --P. Plowman.

   2. (Med.) An intermittent fever, attended by alternate cold
      and hot fits.

   3. The cold fit or rigor of the intermittent fever; as, fever
      and ague.

   4. A chill, or state of shaking, as with cold. --Dryden.

   {Ague cake}, an enlargement of the spleen produced by ague.
      

   {Ague drop}, a solution of the arsenite of potassa used for
      ague.

   {Ague fit}, a fit of the ague. --Shak.

   {Ague spell}, a spell or charm against ague. --Gay.

   {Ague tree}, the sassafras, -- sometimes so called from the
      use of its root formerly, in cases of ague. [Obs.]

Source : WordNet®

ague
     n 1: a fit of shivering
     2: successive stages of chills and fever that is a symptom of
        malaria [syn: {chills and fever}]
     3: a mark (') placed above a vowel to indicate pronunciation
        [syn: {acute accent}, {acute}]