Emulsion/ɪˈmʌlʃn/ Definition 1 of 3Pro Tip 1/3Food context Used often when discussing cooking and food like sauces and dressings. Chef prepared a garlic emulsion to accompany the fish. Pro Tip 2/3Scientific usage In science, emulsions are studied for their properties and behavior. The lab report discussed the stability of the oil-in-water emulsion. Pro Tip 3/3Cosmetic products Emulsion is a common term in the beauty industry for creams and lotions. This facial emulsion is lightweight and perfect for oily skin.