Most ancient enclosures found across Ireland are roughly circular or oval, the product of a consistent defensive or agricultural logic. This one is semicircular, its flat side formed not by a bank or ditch but by a straight drystone field boundary running about fifty metres along the north-east. The curved portion is defined by a scarp, a low earthen step in the land surface, roughly a metre and a half wide and about sixty centimetres high. The interior tilts gently down toward the south-west, giving the whole feature a slight, almost deliberate, bowl-like quality.

An enclosure of this kind, in Irish archaeology, is a broad category: a defined area set apart from its surroundings by some combination of bank, ditch, wall, or scarp, and potentially serving any number of purposes across many centuries, from livestock management to settlement to ritual use. What makes the Lohart example worth pausing over is the combination of its unusual half-circle plan and the way it appears to integrate an existing field boundary as a structural element on one side. The scarp has eroded along its western and north-western base, and there is a slight indent, about half a metre wide, at the south-west, which may indicate a former entrance or simply the result of long agricultural use wearing the feature down. Whether the enclosure predates the drystone boundary or was laid out in relation to it is not recorded, and that ambiguity sits at the centre of what makes the site quietly interesting.