Both Trousers and Pants refer to the same garment; they both refer to an outer garment covering the body from waist to ankles, with a separate part for each leg. The difference between them lies in usage. The main difference between trousers and pants is that the word trouser is commonly used in the UK whereas the word pants is commonly used in America. It is also important to note that in the UK, pants refer to undergarments. We are going to elaborate this difference between trousers and pants in this article.