(uncountable) The property of being thick (in dimension). / (uncountable, countable) A measure of how thick (in dimension) something is. / (countable) A layer.

plural of thickness

Relatively great in extent from one surface to the opposite in its smallest solid dimension. / Measuring a certain number of units in this dimension. / Heavy in build; thickset.

In a thick manner. / Frequently or numerously.

The thickest, or most active or intense, part of something. / A thicket. / (slang) A stupid person; a fool.

(archaic, transitive, intransitive) To thicken.

(idiomatic) In a precarious situation.

(idiomatic) In the middle of (something difficult).

Obsolete spelling of thick

simple past tense and past participle of thick