What is the meaning of Thickness?

The property of being thick (in dimension).

A measure of how thick (in dimension) something is.

A layer.

The quality of being thick (in consistency).

The property of being thick (slow to understand).

The minimum number of planar subgraphs which a given graph can decompose into.

To trim (wood) to a consistent thickness using a thickness planer.

Source: wiktionary.org