Olio is a term used to describe a MIXTURE or medley of different ingredients. It is often used to refer to a dish that contains a variety of different ingredients, such as a stew or a salad. The term can also be used to describe a collection of miscellaneous items, such as a collection of books or a variety of musical instruments. OLIO is derived from the Italian word for 'MIXTURE' and is used to describe a combination of different elements.