lake trout la·ket·rout uncommon noun 1. flesh of large trout of northern lakes Synonymslake trout 2. large fork-tailed trout of lakes of Canada and the northern United States Synonymslake troutsalmon troutSalvelinus namaycush Related words Broader terms troutfreshwater fish Parts lake troutSalvelinus Part of lake trout WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.