# aerosol

/ˈɛɹəˌsɑɫ/ (US) · /ˈeəɹəsˌɒl/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/aerosol
Updated: 2026-08-15

## Definition

a container that releases a liquid as a fine spray when you press a button. It can also mean the tiny particles of liquid or solid that stay hanging in the air.

For teachers: a substance enclosed under pressure and able to be released as a fine spray, typically by means of a propellant gas. Also refers to a suspension of fine solid particles or liquid droplets in air or another gas.

## Examples

- Shake the aerosol can before you use it.
- Scientists are studying how volcanic aerosols in the atmosphere can reflect sunlight and cool the planet.
- The transition from traditional aerosol propellants to more environmentally friendly alternatives was driven by international agreements aimed at protecting the ozone layer from harmful chemical reactions.

## Usage notes

- Often used as a modifier before another noun, such as 'aerosol spray' or 'aerosol can'.

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