Define megaliths? Share with your friends Share 0 Suri Shashank answered this large rough stone used in prehistoric cultures as a monument or building rock 1 View Full Answer Ankita Bisht answered this Hi Nidhi, Shashank has given a correct answer of your question. @Shashank, keep posting as your answers are very helpful to all, thumbs up!!Cheers!! 1 Mansimrat Singh answered this Megaliths are stone boulders used to mark burial sites 6