Source : Webster's Revised Unabridged Dictionary (1913)

Steamy \Steam"y\, a.
   Consisting of, or resembling, steam; full of steam; vaporous;
   misty. --Cowper.

Source : WordNet®

steamy
     adj : hot or warm and humid; "muggy weather"; "the steamy
           tropics"; "sticky weather" [syn: {muggy}, {sticky}]
     [also: {steamiest}, {steamier}]