Home › Words › M › megamonumentmegamonumentmegamonument means A very large monument.EtymologyFrom mega- + monument.nounA very large monument.e.g.“After the end of the grand construction phase of Stonehenge, around 2400 B.C., the monument was altered, but the era of megamonument building was over.” — 2015 November 9, Kenneth Chang, “Stonehenge Begins to Yield Its Secrets”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).