1. a large tropical marine fish with a long pointed bill and a large sail-like dorsal fin, known for its speed

Examples

• The sailfish is one of the fastest fish in the ocean.
• We spotted a sailfish jumping out of the water during our deep-sea fishing trip.
• The sailfish used its large dorsal fin to herd schools of smaller fish.
• Atlantic sailfish can reach speeds of up to 68 miles per hour.
• The captain said sailfish are prized catches among sport fishermen.
• A sailfish’s distinctive bill helps it slash through schools of prey.