definition of
thickness

[1] #1 thickness n. the dimension through an object as opposed to its length or width. wn

[2] #2 thickness n. indistinct articulation; "judging from the thickness of his speech he had been drinking heavily". wn

[3] #3 thickness n. [heaviness] used of a line or mark. wn

[4] #4 thickness n. resistance to flow. wn