water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)

Examples of water vapor in a Sentence

Recent Examples on the Web

For every temperature increase of 1 degree Fahrenheit, the air can hold 4% more water vapor. — Andrew Freedman, CNN Money, 23 July 2026

Using precious metals and chemical reactions, catalytic converters transform harmful carbon monoxide, hydrocarbons and nitrogen oxides into significantly less harmful carbon dioxide, nitrogen and water vapor. — Peter Lyon, Forbes.com, 22 July 2026

The other possibilities were immersion in extremely hot water or exposure to hot-water vapor, according to probable-cause affidavits obtained by Fox News Digital. — Sarah Rumpf-Whitten, FOXNews.com, 20 July 2026

Wildfire smoke consists of microscopic particulate matter, ash and trace minerals that, combined with water vapor, create the haze effect. — Ashley Mowreader, NBC news, 17 July 2026

Word History

First Known Use

15th century, in the meaning defined above

Rhymes for water vapor

• caper
• paper
• raper
• scraper
• shaper
• taper
• newspaper
• notepaper
• sandpaper
• skyscraper
• wallpaper
• wastepaper

Kids Definition

water vapor

noun

: water in a gaseous form especially when below boiling temperature and spread through the atmosphere

Medical Definition

water vapor

noun

: water in a vaporous form especially when below boiling temperature and diffused (as in the atmosphere)