Definition of derailleur in English:

Share this entry


Pronunciation: /dəˈrāl(y)ər/


Image of derailleur
A bicycle mechanism that moves the chain out and up, allowing it to shift to different cogs.
Example sentences
  • The other side of the rollers will now contact the gears, and the derailleurs will now be laterally bending the chain the opposite direction.
  • Then coat your bike's chain, derailleurs and pedals with a light lubricant.
  • My front derailleur and chain rings were so full of mud I couldn't change gears, so I was stuck pedalling in the big chain ring.


1930s: from French, from dérailler 'derail'.

Words that rhyme with derailleur

Adela, bailer, bailor, baler, Benguela, bewailer, hailer, inhaler, jailer, loudhailer, mailer, nailer, railer, retailer, sailer, sailor, scaler, Scheele, shillelagh, tailor, Taylor, trailer, Venezuela, vuvuzela, wailer, whaler

For editors and proofreaders

Syllabification: de·rail·leur

Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.