The Collaborative International Dictionary of English v.0.48:

Torrid \Tor"rid\, a. [L. torridus, fr. torrere to parch, to
   burn, akin to E. Thist: cf. F. torride. See Thirst.]
   1. Parched; dried with heat; as, a torrid plain or desert.
      "Barca or Cyrene's torrid soil." --Milton.
      [1913 Webster]

   2. Violenty hot; drying or scorching with heat; burning;
      parching. "Torrid heat." --Milton.
      [1913 Webster]

   Torrid zone (Geog.), that space or board belt of the earth,
      included between the tropics, over which the sun is
      vertical at some period of every year, and the heat is
      always great.
      [1913 Webster]

WordNet (r) 3.0 (2006):

torrid
    adj 1: characterized by intense emotion; "ardent love"; "an
           ardent lover"; "a fervent desire to change society"; "a
           fervent admirer"; "fiery oratory"; "an impassioned
           appeal"; "a torrid love affair" [syn: ardent,
           fervent, fervid, fiery, impassioned, perfervid,
           torrid]
    2: emotionally charged and vigorously energetic; "a torrid
       dance"; "torrid jazz bands"; "hot trumpets and torrid
       rhythms"
    3: extremely hot; "the torrid noonday sun"; "sultry sands of the
       dessert"

Moby Thesaurus II by Grady Ward, 1.0:

65 Moby Thesaurus words for "torrid":
   amorous, ardent, arid, baking, blazing, blistering, blistery,
   boiling, broiling, burning, burning hot, canicular, cooking,
   ebullient, erotic, fervent, fervid, feverish, fiery, flaming,
   flushed, grilling, heated, hot, hot as fire, hot as hell,
   hot-blooded, humid, impassioned, inflamed, intense, like a furnace,
   like an oven, lustful, muggy, overheated, overwarm, parched,
   parching, passionate, piping hot, red-hot, roasting, scalding,
   scorched, scorching, searing, seething, sexy, simmering, sizzling,
   sizzling hot, smoking hot, steaming, steamy, stifling, sudorific,
   sultry, sweating, sweaty, sweltering, sweltry, toasting, tropical,
   white-hot