Juan de Fu·ca (d? fo?o?k?, fyo?o?-), Strait of The southwest part of the Salish Sea, lying between northwest Washington State and Vancouver Island, British Columbia, Canada, linking Puget Sound with the Pacific Ocean.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.Juan de Fuca (?d?u??n d? ?fju?k?; Spanish xwan de ?fuka) n (Placename) Strait of Juan de Fuca a strait between Vancouver Island (Canada) and NW Washington (US). Length: about 129 km (80 miles). Width: about 24 km (15 miles)Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Juan de Fu?ca (?w?n d? ?fyu k?, ?fu-, ??w?n) n. Strait of, a strait between Vancouver Island and NW Washington. 100 mi. (160 km) long; 15?20 mi. (24?32 km) wide. Also called Juan? de Fu?ca Strait?. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.