The name itself offers a partial clue: Knockadorraghy derives from the Irish, likely incorporating cnoc, meaning hill or mound, which suggests the earthwork may occupy or define an elevated feature in the terrain. Earthworks of this kind are among the most ambiguous monuments in the Irish archaeological record. The term covers a wide range of man-made or man-altered ground features, from the enclosing banks of a ringfort or rath, a circular enclosed settlement typical of the early medieval period, to burial mounds, field boundaries, or the degraded remains of structures whose original purpose has long since become unclear.

What is known about this particular earthwork is, for now, thin. It has been recorded as a monument, which means fieldwork at some point identified something worth noting: an unusual rise or depression in the ground, a bank or fosse, some arrangement that did not look entirely natural. Beyond that, the specifics of its date, form, and function remain undocumented in any publicly accessible form. County Mayo is dense with such features, many of them unexcavated and uninterpreted, scattered across a landscape that has seen continuous human activity from the Neolithic period onward. Without further detail, Knockadorraghy's earthwork joins a long list of quietly ambiguous sites that are known to exist but not yet fully understood.