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

flywheel

play
noun fly·wheel \-ˌhwēl, -ˌwēl\

Simple Definition of flywheel

  • : a heavy wheel that is part of a machine and that controls the speed of machinery

Source: Merriam-Webster's Learner's Dictionary

Full Definition of flywheel

  1. :  a heavy wheel for opposing and moderating by its inertia any fluctuation of speed in the machinery with which it revolves; also :  a similar wheel used for storing kinetic energy (as for motive power)


Learn More about flywheel


Seen and Heard

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

WORD OF THE DAY

mysterious, holy, or spiritual

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

lavender-fields-in-france

Which of these is a synonym of caesura?

interruption megillah torrent rebellion
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ