Meaning of THICKNESS in English

THICKNESS

n.1 the state of being thick.

2 the extent to which a thing is thick.

3 a layer of material of a certain thickness (three thicknesses of cardboard).

4 a part that is thick or lies between opposite surfaces (steps cut in the thickness of the wall).

Etymology: OE thicness (as THICK, -NESS)

Oxford English vocab.      Оксфордский английский словарь.