thickener

noun
UK /ˈθɪk.ən.ər/
US /ˈθɪk.ən.ɚ/

A thickener is something you add to a liquid to make it thicker.

She added cornstarch as a thickener to make the soup creamier.


OTHER MEANINGS

2. A substance added to paint or ink to increase its viscosity.

The painter mixed a thickener into the paint so it would not drip.

3. A chemical added to a product to give it a denser consistency.

This shampoo contains a thickener to make it easier to pour.

4. A person or thing that makes something thick or denser.

The machine acts as a thickener for the sludge at the water plant.