lu·te·fisk (lo?o?t?-f?sk?) also lut·fisk (lo?ot?f?sk?)n. A traditional Scandinavian dish made from stockfish that has been soaked in a lye solution for several days before cooking, becoming soft and gelatinous.[Norwegian : lut, lye (from Swedish, from Old Norse laudhr, soap, foam; see leu(?)- in Indo-European roots) + fisk, fish (from Old Norse fiskr).]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.lutefisk (?lu?t??f?sk) n (Cookery) a traditional Scandinavian fish dish, usually consisting of dried whitefish and lyeCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014lu?te?fisk (?lu t??f?sk) n. dried cod tenderized by soaking in lye, which is rinsed out before cooking. [1920?25;