Scap·a Flow (sk?p??) A sheltered area of water in the Orkney Islands off northern Scotland. It was the site of the chief British naval base in both world wars. The German fleet was scuttled here in June 1919 at the end of World War I.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.Scapa Flow (?skæp?) n (Placename) an extensive landlocked anchorage off the N coast of Scotland, in the Orkney Islands: major British naval base in both World Wars. Length: about 24 km (15 miles). Width: 13 km (8 miles)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Sca?pa Flow? (?sk? p?, ?skæp ?) n. a sea basin off the N coast of Scotland, in the Orkney Islands. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.