1) Lipid infiltration of the hepatic parenchymal cells resulting in a yellow-colored liver. The abnormal lipid accumulation is usually in the form of triglycerides, either as a single large droplet or multiple small droplets. Fatty liver is caused by an imbalance in the metabolism of fatty acids.

2) An abnormal condition of the liver that is characterised by lipid accumulation in the hepatocytes to the extent that lipids account for more than five percent of liver weight and that is caused especially by injury, malnutrition, or hepatotoxins.

3) A liver affected with fatty liver.