Fil is a term that can refer to a variety of concepts, but it is often associated with a unit of currency in some countries, such as the Philippines. In this context, a fil is a subdivision of the peso, with 100 fils making up one peso. In another context, fil can also refer to a type of thread or wire used in sewing or crafting. This material is essential for creating textiles and other items, as it allows for the joining of different pieces together.