Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Medical
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

hydrofoil

play
noun hy·dro·foil \ˈhī-drə-ˌfȯi(-ə)l\

Simple Definition of hydrofoil

  • : a very fast boat that rises partly out of the water when moving at high speeds

Full Definition of hydrofoil

  1. 1 :  a body similar to an airfoil but designed for action in or on water

  2. 2 :  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

1919

First Known Use of hydrofoil

1919


Learn More about hydrofoil


Seen and Heard

What made you want to look up hydrofoil? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

February 7, 2016

a slight offense

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

image1037863653

Which of the following refers to thin, bending ice, or to the act of running over such ice?

spindrift duvet pince-nez kittly-benders
Name That Thing

10 quick questions: hear them, spell them, and see how your skills compare to the crowd.

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ