This is a bullaun stone, a type found widely across Ireland, typically associated with early ecclesiastical sites: a block of stone, usually natural or roughly shaped, into which circular or oval basins have been ground. Their exact purpose remains debated, but they have been linked to ritual water collection, cursing rites, and healing traditions, and they tend to cluster near churches, holy wells, and monastic enclosures.

The stone at Killeenemer measures roughly 1.4 metres by 0.75 metres and stands about half a metre high. Its three hollows vary in size, the largest sitting in the northwest corner with a diameter of around 38 centimetres and its own overflow channel cut into the north side of the stone. A second hollow of comparable depth lies immediately to its southeast, and a third, slightly smaller and oval in shape, sits on the south side with its own overflow channel. The overflow channels are a detail worth pausing over: they imply the hollows were intended to hold water, and that the movement of that water was considered important enough to engineer. Writing in 1932, a scholar named Power recorded a stone near the local church matching these dimensions almost exactly, describing it as five feet by two by three with three cup-shaped artificial cavities of bullaun type. It is very likely the same stone. The site is not isolated in its landscape: a standing stone lies roughly 40 metres to the south, and the remains of an early ecclesiastical enclosure sit about 350 metres to the north, placing the bullaun within a cluster of monuments that together suggest long and layered activity in this corner of the parish.