(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).

A dense, but generally small, growth of shrubs, bushes or small trees; a copse. / (figuratively) A dense aggregation of other things, concrete or abstract.

In a thick manner.

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.

(chiefly Britain, derogatory, slang) A dimwit or idiot.

(family, idiomatic) Family relations and loyalties are stronger than relationships with people who are not family members.

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

comparative form of thick: more thick