1. (noun) a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes

• aerofoil
• airfoil
• control surface
• surface

2. (noun) (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel

• steering mechanism
• steering system

1. (noun) (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel

• navigation
• sailing
• seafaring