1 vapor | Definition of vapor

vapor

noun
va·​por | \ ˈvā-pər How to pronounce vapor (audio) \

Definition of vapor

 (Entry 1 of 2)

1 : diffused matter (such as smoke or fog) suspended floating in the air and impairing its transparency
2a : a substance in the gaseous state as distinguished from the liquid or solid state
b : a substance (such as gasoline, alcohol, mercury, or benzoin) vaporized for industrial, therapeutic, or military uses also : a mixture (such as the explosive mixture in an internal combustion engine) of such a vapor with air
3a : something unsubstantial or transitory : phantasm
b : a foolish or fanciful idea

4 vapors plural

a archaic : exhalations of bodily organs (such as the stomach) held to affect the physical or mental condition
b : a depressed or hysterical nervous condition

vapor

verb
vapored; vaporing\ ˈvā-​p(ə-​)riŋ How to pronounce vaporing (audio) \

Definition of vapor (Entry 2 of 2)

intransitive verb

1a : to rise or pass off in vapor
b : to emit vapor
2 : to indulge in bragging, blustering, or idle talk

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Other Words from vapor

Verb

vaporer \ -​pər-​ər How to pronounce vaporer (audio) \ noun

Synonyms for vapor

Synonyms: Verb

blow, boast, brag, bull [slang], crow, gasconade, swagger, vaunt

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Did You Know?

Verb

Speakers of the English language, mindful of the lightness and unsubstantiality of floating air and gas, have put several airy words to good use over the years to describe the act of talking idly or boastfully. The earliest such word is blow (as in "he kept blowing about his new job"), which drifted into English sometime about 1400. Vapor wafted into the language in the 1620s, and a little over 200 years later windbags, later also known as gasbags, not only blew and vapored but also gassed about anything they could.

Examples of vapor in a Sentence

Verb

a faded Southern belle tiresomely vaporing about all the handsome beaux she had in her long-ago youth

Recent Examples on the Web: Noun

Just last week, the city of Fort Lauderdale proposed a ban on e-cigarettes, e-pipes, vapor products, or hookah to anyone younger than 21. Cindy Krischer Goodman, sun-sentinel.com, "Vaping triggers health issues for Florida teens," 31 Aug. 2019 While lighting the burn barrel, vapors ignited, leaving him with flash burns. Catalina Righter, baltimoresun.com/maryland/carroll, "Keymar man suffers flash burns, is flown to hospital for treatment," 30 Aug. 2019 Just the FAQs, USA TODAY COLUMBUS – An Ohio mother is suing e-cigarette maker Juul Labs Inc. for marketing its nicotine vapor products to teens like her twin daughters and failing to warn consumers about the products' high nicotine levels. Jackie Borchardt, Cincinnati.com, "Ohio mom sues Juul after teen daughters become addicted to e-cigarettes. Juuling led to mood swings and migraines, suit says.," 26 Aug. 2019 Juul claims the San Francisco ordinance will lead former adult smokers who successfully switched to vapor products back to deadly cigarettes. Megan Cerullo, CBS News, "Juul raises $325 million despite growing health and legal concerns with vaping," 19 Aug. 2019 In a statement, Juul said Rubinstein would oversee research on underage use of vapor products, guide the company’s youth prevention programs and policy positions and help form links with the public health community. Los Angeles Times, "Juul hires a leading addiction researcher. Is it an echo of Big Tobacco tactics?," 22 July 2019 Some sported muscle sheaths that swell when exposed to ethanol vapor; others were veneered with a material that shrinks when soaked in a glucose solution. Sid Perkins, Scientific American, "A New Twist on Artificial Muscles," 11 July 2019 For the cultured cells, exposure to e-cigarette vapor induced many of the same changes in lung macrophages that have been seen in cigarette smokers and patients with COPD, the researchers note. Fox News, "E-cigarette vapor tied to changes in lung cells," 15 Aug. 2018 Home prices sagged and crashed; owners’ equity holdings turned to vapor. Kenneth R. Harney, courant.com, "Booming Home Equity: Financial Opportunity Or Warning Sign?," 28 June 2018

Recent Examples on the Web: Verb

In the fourth, Evers used his veto in an attempt to ensure a tax on vaping products would apply to any device containing fluid and to vapor fluid sold separately. Washington Post, "Conservative lawsuit challenges Wisconsin governor’s vetoes," 31 July 2019 In the fourth, Evers used his veto in an attempt to ensure a tax on vaping products would apply to any device containing fluid and to vapor fluid sold separately. Washington Post, "Conservative lawsuit challenges Wisconsin governor’s vetoes," 31 July 2019 But whole body cryotherapy exposes the body for a couple of minutes to vapor that has been supercooled to somewhere between minus 200 and minus 300 degrees Fahrenheit. Aaron E. Carroll, New York Times, "Cold Therapy? Maybe Better Save Your Money," 2 Jan. 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vapor.' 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 vapor

Noun

14th century, in the meaning defined at sense 1

Verb

15th century, in the meaning defined at sense 1a

History and Etymology for vapor

Noun

Middle English vapour, borrowed from Anglo-French & Latin; Anglo-French vapor, vapour, borrowed from Latin vapor, earlier vapōs "exhalation, steam, warmth," perhaps akin to Lithuanian kvãpas "smell, scent"

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More Definitions for vapor

vapor

noun

English Language Learners Definition of vapor

: a substance that is in the form of a gas or that consists of very small drops or particles mixed with the air

vapor

noun
va·​por | \ ˈvā-pər How to pronounce vapor (audio) \

Kids Definition of vapor

1 : fine bits (as of fog or smoke) floating in the air and clouding it
2 : a substance in the form of a gas water vapor