- any of the winglike structures attached to the hull of some watercraft: at certain speeds the hull lifts clear of the water and the craft skims along on the hydrofoils
- a craft with hydrofoils
Origin of hydrofoilhydro- + (air)foil
- A winglike structure attached to the hull of a boat that raises all or part of the hull out of the water when the boat is moving forward, thus reducing drag.
- A boat equipped with hydrofoils. Also called hydroplane .
hydro- + foil