1) A hedge, wall or other enclosure, a short form of ‘defence’.
1533 That every man make his fens be twixt neghtbirs, Selby. William Storr of Scalm Park wrote in his memorandum book: Of quicksett – I sett the fence that the lane of both launds is separated by in 1690 ... I sett the fence that Cuts keepers Close of, etc, Scalm Park. It was used also as a verb: 1647 Harrisson promised to fence the wall between Crockhill bast and Bromead Croft, Thurlstone. See defence.