Saturation \Sat`u*ra"tion\, n. [L. saturatio: cf. F. saturation.]

1. The act of saturating, or the state of being saturating; complete penetration or impregnation.

2. (Chem.) The act, process, or result of saturating a substance, or of combining it to its fullest extent.

3. (Optics) Freedom from mixture or dilution with white; purity; -- said of colors.

Note: The degree of saturation of a color is its relative purity, or freedom from admixture with white.

Source: Webster's Revised Unabridged Dictionary (1913)