/sach'euh ray"sheuhn/ , n.
1. the act or process of saturating.
2. the state of being saturated.
3. Meteorol. a condition in the atmosphere corresponding to 100 percent relative humidity.
4. the degree of chroma or purity of a color; the degree of freedom from admixture with white.
5. Magnetism. the state of maximum magnetization of a ferromagnetic material.
[ 1545-55; saturation- (s. of saturatio ) a filling, equiv. to saturat ( us ) (see SATURATE) + -ion- -ION ]