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.

Saturated \Sat"u*ra`ted\, a.
   1. Filled to repletion; holding by absorption, or in
      solution, all that is possible; as, saturated garments; a
      saturated solution of salt.

   2. (Chem.) Having its affinity satisfied; combined with all
      it can hold; -- said of certain atoms, radicals, or
      compounds; thus, methane is a saturated compound.
      Contrasted with {unsaturated}.

   Note: A saturated compound may exchange certain ingredients
         for others, but can not take on more without such
         exchange.

   {Saturated color} (Optics), a color not diluted with white; a
      pure unmixed color, like those of the spectrum.

Source : WordNet®

saturated
     adj 1: being the most concentrated solution possible at a given
            temperature; unable to dissolve still more of a
            substance; "a saturated solution" [syn: {concentrated}]
            [ant: {unsaturated}]
     2: wet through and through; thoroughly wet; "stood at the door
        drenched (or soaked) by the rain"; "a shirt saturated with
        perspiration"; "his shoes were sopping (or soaking)"; "the
        speaker's sodden collar"; "soppy clothes" [syn: {drenched},
         {soaked}, {soaking}, {sodden}, {sopping}, {soppy}]
     3: used especially of organic compounds; having all available
        valence bonds filled; "saturated fats" [ant: {unsaturated}]
     4: (of color) being chromatically pure; not diluted with white
        or gray or black [syn: {pure}] [ant: {unsaturated}]