# diffuser

/dɪfjˈuːsɐ/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/diffuser
Updated: 2026-05-26

## Definition

a small machine that turns water and essential oils into a fine mist. You use it to make a room smell nice or to help you relax.

For teachers: an electronic device that converts liquid into a fine mist using ultrasonic vibrations. Often used for aromatherapy or to humidify indoor air.

## Examples

- I use a diffuser with lavender oil to help me sleep.
- The hotel room was equipped with a high-quality diffuser to ensure guests enjoyed a relaxing scent throughout their stay.
- While some prefer traditional candles, many modern wellness enthusiasts opt for a digital diffuser, which allows for precise control over the intensity and duration of the aromatic mist.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.