selvage Syllabification: (sel·vage)Pronunciation: /ˈselvij/Translate selvage | into Italian Definition of selvage noun an edge produced on woven fabric during manufacture that prevents it from unraveling. Geology a zone of altered rock, especially volcanic glass, at the edge of a rock mass. Origin: late Middle English: from an alteration of self + edge, on the pattern of early modern Dutch selfegghe. The geological term dates from the 1930sselvage in other Oxford dictionaries Definition of selvage in the British & World English dictionary