Source : Webster's Revised Unabridged Dictionary (1913)

Clean \Clean\, v. t. [imp. & p. p. {Cleaned}; p. pr. & vb. n.
   {Cleaning}.] [See {Clean}, a., and cf. {Cleanse}.]
   To render clean; to free from whatever is foul, offensive, or
   extraneous; to purify; to cleanse.

   {To clean out}, to exhaust; to empty; to get away from (one)
      all his money. [Colloq.] --De Quincey.

Cleaning \Clean"ing\, n.
   1. The act of making clean.

   2. The afterbirth of cows, ewes, etc. --Gardner.

Source : WordNet®

cleaning
     n : the act of making something clean; "he gave his shoes a good
         cleaning" [syn: {cleansing}, {cleanup}]