noun hatfield a town in central Hertfordshire, in SE England: incorporated into (Welwyn Hatfield) 1974. 1
noun hatfield a market town in S central England, in Hertfordshire, with a new town of the same name built on the outskirts: university (1992); site of Hatfield House (1607–11), the seat of the Cecil family. Pop: 32 281 (2001) 0
