noun

• (nautical) A vertical partition dividing the hull into separate compartments; often made watertight to prevent excessive flooding if the ship's hull is breached.
• (aerospace) A similar partition in an aircraft or spacecraft.
• (mechanics) A partition or panel through which connectors pass, or a connector designed to pass through a partition.
• A pressure-resistant sealed barrier to any fluid in a large structure.
• A retaining wall along a waterfront.