The Collaborative International Dictionary
Kistvaen \Kist"vaen\ (k[i^]st"v[=a]n), n. [W. cist-faen.] (Arch[ae]ol.) A Celtic monument, commonly known as a dolmen.
Wiktionary
n. A stone coffin in the form of a pit covered with earth and surrounded by stones.
Wikipedia
A kistvaen or cistvaen is a tomb or burial chamber formed from flat stone slabs in a box-like shape. If set completely underground, it may be covered by a tumulus. The word is derived from the Welsh cist (chest) and maen (stone). The term originated in relation to Celtic structures, typically pre- Christian, but in antiquarian scholarship of the 19th and early 20th centuries it was sometimes applied to similar structures outside the Celtic world.
One of the most numerous kinds of kistvaen are the Dartmoor kistvaens. These often take the form of small rectangular pits about 3 ft. (0.9 m) long by 2 feet (0.6 m) wide. The kistvaens were usually covered with a mound of earth and surrounded by a circle of small stones. When a body was placed in the kistvaen, it was usually lain in a contracted position. Sometimes however the body was cremated with the ashes placed in a cinerary urn.
Usage examples of "kistvaen".
Thereupon do thou immediately fold the covering around them, and bury them in a kistvaen, in the strongest place thou hast in thy dominions, and hide them in the earth.