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

No other spacecraft has ever descended into the moon’s shadowy south polar craters, although NASA did crash a rocket into one in 2009 and watched a resultant plume of water vapor burst out. — Jonathan O'Callaghan, Scientific American, 20 Aug. 2026

Instead, the apparatus creates its cleaning plasma from the spacecraft’s own air and water vapor. — Rahul Rao, Space.com, 19 Aug. 2026

The disease is contracted by breathing in water vapor, not spread from person to person, officials said. — Colin Mixson, New York Daily News, 14 Aug. 2026

Its engine’s combustion results only in water vapor, with no carbon emissions. — Marissa E. Yingling, The Conversation, 12 Aug. 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)