diffuser
nounUK /dɪˈfjuːzə/
US /dɪˈfjuːzər/
A diffuser is a thing that spreads something like light, smell, or sound around a room.
She put a diffuser in the living room so the whole house would smell like lavender.
RELATED WORDS
OTHER MEANINGS
2. A device that softens and spreads light from a lamp so it is not too bright.
The photographer clipped a diffuser over the flash to make the light softer.
3. A cone or attachment that spreads air, sound, or liquid in a wider direction.
The hairdryer's diffuser helps dry curly hair without blowing it all over the place.
4. A device that releases a scent or essential oil into the air.
He refilled the reed diffuser with fresh oil before the guests arrived.