Saturation or saturated generally means "thoroughly full", while unsaturated means less than full. These terms may be related to:

• Dew point, which is a temperature that occurs when atmospheric humidity reaches 100% and the air can hold no more moisture
• Market saturation, in economics, a situation in which a product has become diffused (distributed) within a market
• Saturated model, a concept in mathematical logic
• Saturation (album), an album by the alternative rock band Urge Overkill
• Saturation (biology), in mutation studies, the observed number of mutations relative to the maximum amount possible (usually undefined).
• Saturation (chemistry), multiple definitions for chemistry
• Saturation (color), the intensity of a specific hue
• Saturation (magnetic), the state when the material cannot absorb a stronger magnetic field
• Oxygen saturation, a clinical measure of the amount of oxygen in a patient's blood
• Saturation (telecommunications), a number of meanings
• Saturation arithmetic, in arithmetic, a version of arithmetic in which all operations are limited to fixed range
• In the earth sciences, saturation generally refers to the water content in the soil, where the unsaturated zone is above the water table and the saturated zone is below.
• A saturated liquid or saturated vapor contains as much thermal energy as it can without boiling or condensing.
• A saturated transistor is a BJT transistor that is fully turned on.