Stonehenge Syllabification: (Stone·henge)Pronunciation: /ˈstōnˌhenj/Definition of Stonehenge a megalithic monument on Salisbury Plain in Wiltshire, England. Completed in several constructional phases from circa 2950 bc, it was probably used for ritual purposes. Origin:from Old English stān 'stone' + an element related to hengan 'to hang'Stonehenge in other Oxford dictionaries Definition of Stonehenge in the British & World English dictionary