tún (ON) noun

Tún is related to words meaning ‘fence’, ‘barrier’. In Norwegian (not in the laws) it refers to the area around which the farmhouses were grouped. In Icelandic laws it refers to the cultivated land surrounding the farm, which might be enclosed by a túngarðr (see tungarþer) or túnvöllr (q.v.).

home field OIce Grg Klþ 2, 4 Ómb 129 Misc 238 Tíg 256, 257
OIce KRA 15, 24 Refs:

CV s.v. tún; Hastrup 1992, 108; Helle 2001, 106−16; Holmberg, KA 1969, 247−61; KLNM s.v. tún, ONP s.v. tún