Enclosures are among the most common yet most varied monument types in the Irish landscape. The term covers a broad range of forms, from prehistoric ringforts defined by earthen banks and ditches to early medieval ecclesiastical enclosures that once marked out sacred ground. Without more specific information about this particular site, the type, date, and character of the Bun An Mheascáin example remain open questions.

The place name itself offers a small foothold. Bun An Mheascáin translates roughly from Irish as "the mouth" or "the base" of something, with mheascán sometimes interpreted as relating to a rounded or lump-shaped feature in the landscape, though place name meanings in Connacht Irish can be slippery and locally inflected. Galway's western reaches contain a considerable density of early settlement remains, many of them poorly documented in the published record, which makes even a named but under-described enclosure worth noting. The very fact that it has been formally recorded as a monument signals that something on the ground, whether a visible earthwork, a cropmark, or a trace in the soil, caught the attention of surveyors at some point.