The enclosure at Kildrum is roughly oval, stretching around 136 metres east to west and 130 metres north to south, and its boundaries survive in fragmentary but legible form: a steep scarp along part of the circuit, earthen banks with internal and external fosses (the fosse being the ditch that accompanies a bank, common in early Irish ecclesiastical and secular earthworks), sections that have been absorbed into the modern field boundary system, and a curve in a disused roadway to the east that may itself be following the old line of the enclosure. In places the outer bank is stone-faced. The whole thing sits quietly in pasture, doing the work of ordinary farmland, but the double-ramparted form suggests something more deliberate and more layered than a simple enclosure.

The place-name itself carries the key. Kildrum derives from the Irish Ceall Droma, meaning roughly the church of the ridge, and this name appears in Crichad an Chaoilli, a medieval territorial survey of the Fermoy district. Writing in 1932, the scholar Power equated this site with a church said to have been founded by St. Abban, one of the lesser-known early Irish saints associated with Leinster and Munster. Power described the enclosure as crowning the most conspicuous elevation of the townland, on what was then Robinson's farm, and recorded that the site had a particular local identity as Cill na Marbhán, a name that translates roughly as the church of the dead, whose reputation rested largely on its attached cemetery. That combination, a named founder, a dedicated burial ground, and a place-name preserved across more than a millennium, points to a site of genuine early medieval significance, even if no upstanding church structure remains visible today. A possible mill site lying to the south, in a field adjoining a stream, suggests the wider settlement may have had an industrial as well as a sacred dimension.