Source : Webster's Revised Unabridged Dictionary (1913)

Sultry \Sul"try\, a. [Compar. {Sultrier}; superl. {Sultriest}.]
   [From {Sweltry}.]
   1. Very hot, burning, and oppressive; as, Libya's sultry
      deserts.

            Such as, born beneath the burning sky And sultry
            sun, betwixt the tropics lie.         --Dryden.

   2. Very hot and moist, or hot, close, stagnant, and
      oppressive, as air.

            When in the sultry glebe I faint, Or on the thirsty
            mountain plant.                       --Addison.

Source : WordNet®

sultry
     adj 1: sexually exciting or gratifying; "sensual excesses"; "a
            sultry look"; "a sultry dance" [syn: {sensual}]
     2: characterized by oppressive heat and humidity; "the summer
        was sultry and oppressive"; "the stifling atmosphere";
        "the sulfurous atmosphere preceding a thunderstorm" [syn:
        {stifling}, {sulfurous}, {sulphurous}]
     3: burning hot; extremely and unpleasantly hot; "the torrid
        noonday sun"; "sultry sands of the dessert" [syn: {torrid}]
     [also: {sultriest}, {sultrier}]

sultriest
     See {sultry}