any of various fishes having elongated jaws, esp any fish of the family Istiophoridae, such as the spearfish and marlin
billfish in American English
(ˈbɪlˌfɪʃ)
US
nounWord forms: pluralˈbillˌfish or ˈbillˌfishes
any of various fishes with long, narrow jaws that resemble a beak, as many gars or swordfish; esp., any of a family (Istiophoridae) of percoid fishes, as the marlin