1. a large fishing net that floats freely with the ocean current and is not anchored to the sea floor
Usage: also called a gill net when used in this context; commonly used in commercial fishing
2. a fishing net of great length that drifts with currents and catches fish indiscriminately, often causing environmental damage
Usage: controversial fishing method; banned or restricted in many countries due to overfishing concerns

Examples

• The fishing vessel deployed a driftnet that stretched for several miles across the ocean.
• Environmental groups have campaigned against the use of driftnets because they trap endangered species.
• Many countries have banned driftnets to protect marine ecosystems.
• The driftnet caught not only the target fish but also dolphins and sea turtles.
• Modern fishing regulations restrict the length and use of driftnets in international waters.
• Driftnets are considered one of the most destructive fishing methods by marine conservationists.