hy·​dro·​foil ˈhī-drə-ˌfȯi(-ə)l How to pronounce hydrofoil (audio)
: a body similar to an airfoil but designed for action in or on water
: a motorboat that has metal plates or fins attached by struts fore and aft for lifting the hull clear of the water as speed is attained

Illustration of hydrofoil

Illustration of hydrofoil
  • hydrofoil 2

Examples of hydrofoil in a Sentence

Recent Examples on the Web The hydrofoils can be retracted by the push of a button on the C-8’s User interface, for trailering or entering a shallow port. Michael Verdon, Robb Report, 3 July 2024 The series’s green agenda goes beyond pushing the development of electric engines, high-output batteries and hydrofoils, which reduce drag in increase efficiency by lifting the boat’s hull out of the water. J. George Gorant, Robb Report, 9 May 2024 Hot on the hydrofoils of American Magic, INEOS Britannia has launched its race boat for the 37th America’s Cup. Rachel Cormack, Robb Report, 3 May 2024 Flite says the battery for the hydrofoil lasts around an hour and a half before needing a recharge. Boone Ashworth, WIRED, 25 Feb. 2024 See all Example Sentences for hydrofoil 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'hydrofoil.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1919, in the meaning defined at sense 1

Time Traveler
The first known use of hydrofoil was in 1919

Dictionary Entries Near hydrofoil

Cite this Entry

“Hydrofoil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrofoil. Accessed 18 Jul. 2024.

Kids Definition


hy·​dro·​foil ˈhī-drə-ˌfȯil How to pronounce hydrofoil (audio)
: a boat that has fins attached to the bottom by braces for lifting the hull clear of the water to allow faster speeds

More from Merriam-Webster on hydrofoil

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