The process of making something, or becoming, thick or viscous. / A substance, usually a source of starch, used to thicken a sauce. / A thickened part of a structure.

present participle of thicken

Beginning to thicken, becoming thicker.

plural of thickening

(transitive) To make thicker (in the sense of wider). / (transitive) To make thicker (in the sense of more viscous). / (intransitive) To become thicker (in the sense of wider).

That which thickens. / Any substance added to something in order to thicken it; a thickening agent; a binder.

simple past tense and past participle of thicken

Third-person singular simple present indicative form of thicken

plural of thickener

any substance used to increase viscosity, especially of a food product