vapor lock


Definition of vapor lock

: partial or complete interruption of flow of a fluid (such as fuel in an internal combustion engine) caused by the formation of bubbles of vapor in the feeding system

Examples of vapor lock in a Sentence

Recent Examples on the Web During the nine-day flight, Voyager encountered oil problems, a faulty fuel gauge and finally, yesterday morning, a vapor lock that conked out the rear engine for five minutes. San Diego Union-Tribune, 24 Dec. 2021

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

First Known Use of vapor lock

1926, in the meaning defined above

Learn More About vapor lock

Time Traveler for vapor lock

Time Traveler

The first known use of vapor lock was in 1926

See more words from the same year

Dictionary Entries Near vapor lock


vapor lock


See More Nearby Entries 

Statistics for vapor lock

Cite this Entry

“Vapor lock.” Dictionary, Merriam-Webster, Accessed 16 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Commonly Confused Words Quiz

  • vector image of a face with thought expression
  • I went to the ______ store to buy a birthday card.
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!