, es; n. A land-fastness, a strong military position on land, a pass :-- Leoniða on ánum nearwan londfæstenne him wiðstód Leonida in angustiis Thermopylarum obstitit, Ors. 2, 5; Swt. 80, 14.
Cite the scanned version of the original dicionary like this:
Bosworth, Joseph. "land-fæsten." An Anglo-Saxon Dictionary: Based on the Manuscript Collections of the Late Joseph Bosworth. Ed. Thomas Northcote Toller. Oxford: Clarendon Press, 1898. 618.