finnan fin·nan US/ˈfɪnʌn/ uncommon noun 1. haddock usually baked but sometimes broiled with lots of butter Synonymsfinnan haddiefinnan haddocksmoked haddock Related words Word family finnan haddiefinnan haddock Broader terms haddock WordNet 2.1 (Princeton University). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.