Graveslabs of this kind, flat carved or incised stones placed over burial sites, were produced across Ireland from the early medieval period onward, often bearing crosses, inscriptions, or decorative knotwork that can help date them and identify the traditions of the communities that made them. That this one has been formally recorded as a monument at all suggests it was considered significant enough to protect, even if what makes it distinctive remains, for now, largely undocumented in any publicly accessible form.

The townland name Killeely, derived from the Irish Cill Aodhla or a similar form, points to an early ecclesiastical association, with "cill" denoting a small church or monastic cell. Such foundations were common across the west of Ireland from the sixth century onward, and burial grounds associated with them frequently contain carved stonework spanning several centuries. Whether the graveslab at Killeely More belongs to an early Christian phase, a later medieval one, or something else entirely is a question the available record does not yet answer. The physical survival of the slab, in a rural Galway townland with a name suggesting long Christian use of the land, places it within a pattern of quiet continuity that characterises many such sites across Connacht.