The Collaborative International Dictionary of English v.0.48:

Scorch \Scorch\, v. i.
   1. To be burnt on the surface; to be parched; to be dried up.
      [1913 Webster]

            Scatter a little mungy straw or fern amongst your
            seedlings, to prevent the roots from scorching.
                                                  --Mortimer.
      [1913 Webster]

   2. To burn or be burnt.
      [1913 Webster]

            He laid his long forefinger on the scarlet letter,
            which forthwith seemed to scorch into Hester's
            breast, as if it had been red hot.    --Hawthorne.
      [1913 Webster]

   3. To ride or drive at great, usually at excessive, speed; --
      applied chiefly to automobilists and bicyclists. [Colloq.]
      -- Scorch"er, n. [Colloq.]

The Collaborative International Dictionary of English v.0.48:

scorcher \scorch"er\
   a very hot day. [Informal]
   [PJC]

WordNet (r) 3.0 (2006):

scorcher
    n 1: an extremely hot day
    2: a very hard hit ball [syn: scorcher, screamer]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "scorcher":
   Jehu, broiler, flier, goer, hell-driver, horse racer, hot day,
   hummer, hustler, jockey, racer, roaster, runner, sizzler,
   speed demon, speeder, stepper, summer day, turfman