Grease is a thick, oily substance that is often used as a lubricant to reduce friction between moving parts. It is commonly made from a combination of base oil, thickening agents, and additives. Grease is used in various applications, including machinery, automotive engines, and household items, to ensure smooth operation and prevent wear and tear. In cooking, grease refers to fats or oils that are used to prepare food. Common types of cooking grease include butter, olive oil, and vegetable oil. These fats help to enhance flavor, prevent sticking, and improve the texture of dishes. Grease can also accumulate in cooking equipment, requiring regular cleaning to maintain hygiene.