sarsenPronunciation: /ˈsɑːs(ə)n/ (also sarsen stone)Definition of sarsen noun Geology a silicified sandstone boulder of a kind which occurs on the chalk downs of southern England. Such stones were used in constructing Stonehenge and other prehistoric monuments. Origin: late 17th century: probably a variant of Saracensarsen in other Oxford dictionaries Definition of sarsen in the US English dictionary