Fosse Way, major Roman road that traversed Britain from southwest to northeast. It ran from the mouth of the River Axe in Devon by Axminster and Ilchester (Lindinae) to Bath (Aquae Sulis) and Cirencester, thence straight for 60 miles (100 km) to High Cross (Venonae), where it intersected Watling Street, and on to Leicester (Ratae). After crossing the River Trent near Newark, it reached Ermine Street south of Lincoln (Lindum). It was probably laid as a military road along the temporary frontier reached in the Roman conquest before ad 47.