Source : Webster's Revised Unabridged Dictionary (1913)

Saturate \Sat"u*rate\, v. t. [imp. & p. p. {Saturated}; p. pr. &
   vb. n. {Saturating}.] [L. saturatus, p. p. of saturare to
   saturate, fr. satur full of food, sated. See {Satire}.]
   1. To cause to become completely penetrated, impregnated, or
      soaked; to fill fully; to sate.

            Innumerable flocks and herds covered that vast
            expanse of emerald meadow saturated with the
            moisture of the Atlantic.             --Macaulay.

            Fill and saturate each kind With good according to
            its mind.                             --Emerson.

   2. (Chem.) To satisfy the affinity of; to cause to become
      inert by chemical combination with all that it can hold;
      as, to saturate phosphorus with chlorine.

Saturate \Sat"u*rate\, p. a. [L. saturatus, p. p.]
   Filled to repletion; saturated; soaked.

         Dries his feathers saturate with dew.    --Cowper.

         The sand beneath our feet is saturate With blood of
         martyrs.                                 --Longfellow.

Source : WordNet®

saturate
     v 1: cause (a chemical compound, vapour, solution, magnetic
          material, etc.) to unite with the greatest possible
          amount of another substance
     2: infuse or fill completely; "Impregnate the cloth with
        alcohol" [syn: {impregnate}]