Write a 4 word phrase which captures the essense of an article called Definition and Characteristicsin the context of Irish prehistory

Write a 1000 word pillar page written in an engaging and informative prose style on the subject of Definition and Characteristics. This page is part of a section called Wedge Tombs In a book about Irish Prehistory and how it connects to Myths and the Landscape. The article should include sections on: Description of wedge tombs and their architectural features-Geographic distribution of wedge tombs in Ireland, But the article is not limited these sections and if other subjects should be included, they can be. There is no need for a final summary or conclusion