1. any of various large marine fish with an elongated, pointed snout or bill, such as a marlin, sailfish, or swordfish
Usage: usually used in the plural or as a collective noun; common in sport fishing contexts

Examples

• The fisherman spent the day hunting billfish off the coast of Florida.
• Billfish are prized catches for deep-sea anglers.
• The tournament attracts competitors from around the world who want to catch billfish.
• Sailfish and marlin are the most common types of billfish in tropical waters.
• The captain's experience with billfish made him an excellent guide for the charter.
• Billfish use their long bills to stun and injure prey fish.