Added 10 October 2026 billfish /ˈbɪlˌfɪʃ/ noun Categories: AnimalsObscure Words noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about billfish at Wordnik → Where our words come from → Primitive predaceous North American fish covered with hard scales and having long jaws with needlelike teeth. Giant warm-water game fish having a prolonged and rounded toothless upper jaw. Slender long-beaked fish of temperate Atlantic waters. Origin From bill + fish. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: garfishgarpikesauryneedlefishgarbandfishjawfishbatfishboarfishpipefish Back to today's word