Source : Webster's Revised Unabridged Dictionary (1913)

Sot \Sot\, n. [F., fr. LL. sottus; of unknown origin, cf. Ir.
   sotal pride, soithir proud, or Chald. & NHeb. shoten
   foolish.]
   1. A stupid person; a blockhead; a dull fellow; a dolt.
      [Obs.] --outh.

            In Egypt oft has seen the sot bow down, And
            reverence some d?ified baboon.        --Oldham.

   2. A person stupefied by excessive drinking; an habitual
      drunkard. ``A brutal sot.'' --Granville.

            Every sign That calls the staring sots to nasty
            wine.                                 --Roscommon.

Sot \Sot\, a.
   Sottish; foolish; stupid; dull. [Obs.] ``Rich, but sot.''
   --Marston.

Sot \Sot\, v. t.
   To stupefy; to infatuate; to besot. [R.]

         I hate to see a brave, bold fellow sotted. --Dryden.

Sot \Sot\, v. i.
   To tipple to stupidity. [R.] --Goldsmith.

Source : WordNet®

sot
     n : a chronic drinker [syn: {drunkard}, {drunk}, {rummy}, {inebriate}]