DictionaryvaporGas or mist
noun

vapor

VAY-pur/ˈveɪpər/

A substance in the air as a gas or fine droplets.

Violet iodine vapor fills the space above the dark crystals.

A clear, closed glass vessel contains dark iodine crystals at the bottom and translucent violet iodine vapor filling the space above them, making the solid substance and its gaslike form visible together.
Etymology

Latin vapor meant a warm exhalation or steam. The scientific sense makes that everyday image more precise: a substance in gaseous form rather than its usual liquid or solid state.

In context

9NEWS2:58
burn jet fuel they produce exhaust that exhaust is mostly hot water vapor that also contains carbon dioxide trace amounts of sulfur nitrogen
Verify: Is there a secret chemtrail spraying program?

More examples

  • The paint releases harmful vapors as it dries.
  • A thin cloud of vapor rises from the steaming soup.
  • As the alcohol evaporates, it turns into vapor.

Forms

vapor · vapors

vaporize verb — To turn a substance into gas.

vaporous adjective — Consisting of or resembling gas or mist.

Similar words

steam
Specifically water vapor, especially from boiling or heating water.
mist
Tiny liquid droplets suspended in air, rather than gas.
fumes
Airborne emissions, often with a strong smell or harmful effects.