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

This cooling causes the water vapor in the air to condense, resulting in a thick, gray layer of clouds that covers the sky, resembling a blanket. —Newsroom Meteorologist, Austin American Statesman, 24 Feb. 2026

Humidifiers add more humidity to the air by releasing water vapor through evaporation, boiling, or ultrasonic vibration. —Brian Mastroianni, Health, 23 Feb. 2026

Bretherton’s immediate mission was to help the pilots collect information about the ice, water vapor, and air pressure around them. —Quanta Magazine, 20 Feb. 2026

The same report found that these fires are worsening air quality in many part of the country due to wildfire smoke, which is a mixture of gases, water vapor, air pollutants and fine particulate matter. —Mary Kekatos, ABC News, 14 Feb. 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)