1. a flat board or plate attached to the side of a shallow-draft boat to prevent sideways drift
Usage: nautical

Examples

• The Dutch sailing barge used leeboards instead of a centerboard.
• He lowered the leeboard on the windward side before tacking.
• Traditional Thames barges are equipped with large wooden leeboards.
• The leeboard pivots on a pin attached to the hull.
• Shallow-water sailing craft often rely on leeboards for lateral resistance.
• The skipper adjusted the leeboard angle to reduce drag.