1. (n.) A rounded or conical heap of stones erected by early inhabitants of the British Isles, apparently as a sepulchral monument.

2. (n.) A pile of stones heaped up as a landmark, or to arrest attention, as in surveying, or in leaving traces of an exploring party, etc.

arch barrow bench mark bookmark boundary stone brass bust catstone cenotaph column cromlech cross cup cyclolith dolmen footstone grave gravestone headstone hoarstone inscription landmark lighthouse lightship mark marker mausoleum megalith memento memorial memorial arch memorial column memorial statue memorial stone menhir milepost milestone monolith monument mound necrology obelisk obituary pharos pillar plaque platform prize pyramid reliquary remembrance ribbon rostral column seamark shaft shrine stela stone stupa tablet testimonial tomb tombstone tope tower trophy watchtower