thickness

Short definition from Wiktionary

Noun

1. 1
   The property of being thick (in dimension).
2. 2
   A measure of how thick (in dimension) something is.
3. 3
   A layer.
4. 4
   The quality of being thick (in consistency).
5. 5
   The property of being thick (slow to understand).
6. 6
   The minimum number of planar subgraphs which a given graph can decompose into.

Verb

1. 1
   To trim (wood) to a consistent thickness using a thickness planer.