Phrase guide

vapor lock

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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No pronunciation record was provided for this word.

1

noun

Meaning 1

A problem mostly affecting gasoline-fueled internal combustion engines, where the liquid fuel changes state from liquid to gas while still in the fuel delivery system, reducing the pump pressure and causing transient power loss or complete stalling.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: engineering, mechanical, mechanical-engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Synonym of air lock.

Definition source: English Wiktionary via Wiktextract

Usage: countable, especially, uncountable

Topics: engineering, mechanical, mechanical-engineering, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: air lock

Antonyms: none provided

3

noun

Meaning 3

a stoppage in a pipeline caused by gas bubbles (especially a stoppage that develops in hot weather in an internal-combustion engine when fuel in the gas line boils and forms bubbles that block the flow of gasoline to the carburetor)

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: vapour lock

Antonyms: none provided

Broader terms: blockage, block, closure, occlusion, stop, stoppage

History

Etymology

No etymology was provided for this word.