(1):

(v. t.) 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.

(2):

(v. t.) To cause to become completely penetrated, impregnated, or soaked; to fill fully; to sate.

(3):

(p. a.) Filled to repletion; saturated; soaked.