derailleur

noun
de·rail·leur | \ di-ˈrā-lər \

Definition of derailleur 

: a mechanism for shifting gears on a bicycle that operates by moving the chain from one set of exposed gears to another

Examples of derailleur in a Sentence

Recent Examples on the Web

The village spent $1,300 to purchase a Fixit, which includes all the tools necessary to perform basic bike repairs and maintenance, such as fixing a flat tire to adjusting brakes and derailleur gears, along with a heavy-duty air pump. Chuck Fieldman, chicagotribune.com, "Clarendon Hills to put bicycle repair station at Metra stop," 9 Jan. 2018 Superstar Peter Sagan stayed upright, but his chain jammed into his front derailleur and needed servicing. Blair Anthony Robertson, sacbee.com, "Local cyclist is “U.S. handyman” for European pro team," 11 May 2017 Though materials and build play a part in the Ajax’s silent operation, the main reasons are the 8-speed internal hub and belt drive at the heart of the bike’s derailleur-free drivetrain. John Bradley, WIRED, "Review: Spot Ajax," 21 Apr. 2011

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'derailleur.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of derailleur

1930, in the meaning defined above

History and Etymology for derailleur

French dérailleur, from dérailler

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Dictionary Entries near derailleur

deracinate

deraign

derail

derailleur

Derain

derange

derangeable

Statistics for derailleur

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Time Traveler for derailleur

The first known use of derailleur was in 1930

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More Definitions for derailleur

derailleur

noun

English Language Learners Definition of derailleur

: a part on a bicycle that is used to change gears by moving the chain from one gear to another one

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