bowfinPronunciation: /ˈbəʊfɪn/Definition of bowfin noun a predatory American freshwater fish with a large blunt head and a long dorsal fin. It is able to survive for long periods out of water. Amia calva, the only living member of the family Amiidae Origin: late 19th century: from bow1 + finbowfin in other Oxford dictionaries Definition of bowfin in the US English dictionary