A mole or pier-like structure situated at the entrance of a harbour, or running out into lake or the sea, so as to defend the harbour or coast. Alternatively the term can refer to a first floor that overhangs the ground floor. Such as building would be jettied.
Chaucer House, Bawsdeswell, is a 15th or 16th century timber framed and jettied house. (© NCC)