A court tomb is a type of megalithic communal burial monument, typically featuring an open forecourt of upright stones leading into one or more roofed gallery chambers, and they are most densely concentrated in the north of Ireland. Finding one here in the Burren, in something close to legible condition, is quietly surprising. The structure measures roughly ten metres north to south and five metres east to west, with a semicircular court of upright limestone slabs opening to the north and narrowing through a gap just over half a metre wide into a rectangular inner chamber. A second chamber to the south is only partially preserved, represented now by a single surviving sidestone, some overgrown rubble, and the interference of a modern drystone wall that may have done further damage to its southern end.

The Burren currently has five recorded court tombs, of which Teergonean is one. The others lie at Parknabinnia, Ballyganner North, and Leamaneh North, with a possible fifth at Ballycasheen still under investigation. Scholar Carleton Jones, writing in 2003, observed that three of these monuments, those at Parknabinnia, Ballyganner North, and Leamaneh North, share unusual characteristics: a narrow, straight-sided forecourt roughly as wide as the chambers themselves, and a roughly circular or U-shaped cairn rather than the long, tapering cairn more typical of the form. Jones suggested those three should be treated cautiously as court tombs until their precise relationship to the broader tradition is better understood. Teergonean sits in an interesting middle ground. Its wider forecourt aligns it more closely with the classic northern Irish court tomb tradition, yet Jones also noted that it may have originally possessed a circular or U-shaped cairn similar to its three Burren neighbours. It is a monument that fits the category and quietly complicates it at the same time.