Stone·henge (st?n?h?nj?) A group of standing stones on Salisbury Plain in southern England. Dating to c. 2200-1800 bc, the megaliths are enclosed by a circular ditch and embankment that may date to c. 3000. The arrangement of the stones suggests that Stonehenge was used as a religious center and also as an astronomical observatory.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Stonehenge (?st??n?h?nd?) n1. (Placename) a prehistoric ruin in S England, in Wiltshire on Salisbury Plain: constructed over the period of roughly 3000?1600 bc; one of the most important megalithic monuments in Europe; believed to have had religious and astronomical purposes2. (Archaeology) a prehistoric ruin in S England, in Wiltshire on Salisbury Plain: constructed over the period of roughly 3000?1600 bc; one of the most important megalithic monuments in Europe; believed to have had religious and astronomical purposesCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Stone?henge (?sto?n h?nd?) n. a prehistoric megalithic monument on Salisbury Plain, in S England, dating to late Neolithic and early Bronze Age times (3rd to 2nd millennium B.C.): believed to have had religious or astronomical functions. [-henge, probably orig. ?something hanging?; compare hinge] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.